Tim Ameel Presentation Title: Moderate Reynolds Number Flow Mixing Kinematics in a T-Channel Abstract: An experimental investigation of water ?ow in a T-shaped channel with rectangular cross section (20 x 20 mm inlet ID and 20 x 40 mm outlet ID) has been conducted for a Reynolds number Re range of 56 to 422, based on inlet diameter. Dynamical conditions and the T-channel geometry are applicable to the microscale. 2-D planar particle imaging velocimetry (PIV) and laser induced ?uorescence (LIF) were applied in multiple locations of the T-channel junction and outlet to investigate local dynamical behaviors and scalar structures. Steady symmetric and asymmetric ?ow regimes predicted in the literature are veri?ed. Unsteady ?ow regimes, which are numerically predicted to occur at higher Re, are also examined, and real-time LIF results illuminate the evolution of unsteady structure. Simultaneous planar and discrete-point LIF measurements relate the development of oscillatory behavior in the outlet channel to ?ow structure in the junction. Time scales are presented for unsteady ?ow regimes, which are found to exhibit periodic behavior and to occur for Re ? 195. An unsteady symmetrical regime is identi?ed for Re ? 350 that is detrimental to mixing and mechanisms behind the wide range of mixing qualities predicted for this regime are explained. Results of all experimental trials are used to construct a regime map. A symmetric topology is found to be dominant for Re from 56 to 116, when ?ow is steady, and 350 to 422, when ?ow is characterized by unsteady stagnation-point oscillation in the T-channel junction. Asymmetric ?ow, which is positively indicated for mixing, is dominant for Re between 142 and 298, and the ?uid interface exhibits both steady (two standing vortices) and unsteady (shear-layer type roll-up) behaviors. This result suggests a practical operating range of 142 ? Re ? 298 where asymmetric ?ow is highly likely to occur. Biography: Tim Ameel is Professor and Chair of the Department of Mechanical Engineering at the University of Utah. He has authored nearly 100 manuscripts, with the vast majority focused on the fundamentals of microscale fluid dynamics and convection. Analytical work has emphasized single-phase flow in the thermally developing region of microtubes and microchannels where the fluid is in the slip regime. Using computational models, the effects of viscous dissipation, axial conduction, and thermal creep in microchannels have been examined. Experiments have been performed in microtubes and microchannels using a variety of single-phase and two-phase fluids. Flow visualization techniques (molecular tagging velocimetry (MTV), particle image velocimetry (PIV), and laser induced fluorescence (LIF)) have been applied to more closely examine microchannel flow fields. These visualization methods have been applied to a T-channel mixer to examine the mixing kinematics at moderate Reynolds number. In addition, MTV has been utilized in a rectangular microchannel to generate local velocity data to further understand frictional losses and to generate data to examine turbulence structure. Ongoing work includes the development of a computational model to study fluid structure interaction in the slip regime. In 2006, Professor Ameel was a Fulbright scholar at the Royal Institute of Technology in Stockholm.
		Patrick Anderson Presentation Title: Single and multi-component transport and mixing in microfluidic channels Abstract: In this talk I will review some of our recent work on transport and mixing in microfluidic devices. At small length scales viscous forces dominate the flow and efficient mixing cannot be achieved by relying on inertia. Novel examples of static mixers, that elegantly use the bakers transformation to achieve chaotic advection and which are fabricated using injection molding, are presented and quantitatively compared. In addition, the effectiveness of two types of active mixers, one using magnetic particles and the second incorporating bio-inspired artificial cilia are discussed. In the second part of the talk the effect of confinement on the deformation and breakup of drops, pairs of drops, and trains of drops is discussed. Computational results, using a boundary integral method with a two-wall Greens function, are compared with experimental observations. Biography: Patrick Anderson is associate professor in fluid mechanics in polymer processing. He studied Applied Mathematics at the Eindhoven University of Technology with Prof. Dr. Arnold A. Reusken as his advisor. In 1999 he received his Ph.D. degree from the Department of Mechanical Engineering at the same university with Prof. dr. ir. Han E.H. Meijer as his advisor. Following a year break at Océ Technologies working on hot-melt inkjet printing he joined the Polymer Technology group. His present interests include structure development during flow, interfacial phenomena, microfluidics, and polymer processing. In 2008 he received the International Polymer Processing society Morand Lambla award.
		Daniel Attinger Presentation Title: Injection, transport and removal of gas bubbles in microchannels for heat transfer enhancement Abstract: One limitation of single-phase microchannel heat transfer is the relatively low Nusselt number, due to laminar flow. Several methods have been used to improve the Nusselt number such as geometric obtrusions, pins and fins and nanofluids. In this talk, we experimentally investigate the heat transfer enhancement in water-filled microchannels with the periodic injection of air bubbles. The segmented flow pattern generates recirculation loops that enhance transport phenomena. We show that segmented flow can enhance the Nusselt number of laminar flows in short channels by a factor two. Also, we demonstrate a simple and high flow rate method for removing bubbles from microchannels, using a hydrophobic porous membrane. The role of the thin liquid film coating the bubbles is investigated. Biography: Daniel Attinger is an assistant professor in the Mechanical Engineering Department of Columbia University, New York USA. His experimental and numerical research is in multiphase flow and microfluidics, with a special interest in internal and free-surface flows involving the generation and handling of drops, bubbles and solid particles. Applications are in the areas of MEMS manufacturing, bioengineering, microscale heat transfer and lab on a chip techniques. Daniel Attinger is the recipient of a 2002 ETH Zurich Silver Medal, and a 2005 NSF CAREER award.
		Subir Bhattacharjee Presentation Title: Effects of Non-linearity of the Momentum Conservation Equation during Electrokinetic Transport in Nano and Microchannels Abstract: Electrokinetic transport phenomena, such as electroosmosis, streaming potential, electrophoresis, and sedimentation potential, are central to many micro- and nano-channel flows. During continuum modeling of such phenomena, incorporation of the electrical body force term can make the fluid momentum conservation equation highly non-linear. This non-linearity is often ignored in small-scale electrokinetic flow modeling because of our implicit reliance on the linearity of the Stokes momentum equations for low Reynolds number flows. In this paper, ramifications of this non-linear momentum equation in electrokinetic flows will be described with examples of our recent studies on pressure driven flows through porous media for electrokinetic power generation, electroosmotic flow of charged entities in nanochannels, and flow of DNA through self-assembled porous media under pulsed electric fields. Biography: Dr. Subir Bhattacharjee received his Ph.D. in Chemical Engineering in 1996 from IIT Kanpur, India. He was a post doctoral fellow and lecturer at University of California, Los Angeles, between 1996 and 1998, and an associate Research Scientist at Yale University, New Haven, between 1999 and 2001. In 2001 he joined the University of Alberta as an assistant professor in the Mechanical Engineering department. Dr. Bhattacharjee is currently a professor in the department and the Director of the Oil Sands and Coal Interfacial Engineering Facility. He holds an NSERC Industrial Research Chair in Water Quality Management for Oil Sands Extraction, and a Canada Research Chair in Colloids and Complex Fluids. His research background is separation processes for solid-liquid and liquid-liquid mixtures, with applications in membrane separations, electrokinetic transport processes, and microfluidic platforms for separation and diagnostics. He has written a book titled Electrokinetic and Colloid Transport Phenomena, and has authored over seventy papers in areas of colloidal interactions, colloid transport, electrokinetics, and separation processes
		Stéphane Colin Presentation Title: Gas microflows in the slip flow regime: a review on heat transfer Abstract: Accurate modeling of gas microvection is crucial for a lot of MEMS applications (micro-heat exchangers, pressure gauges, fluidic microactuators for active control of aerodynamic flows, mass flow and temperature micro-sensors, micropumps and microsystems for mixing or separation for local gas analysis, mass spectrometers, vacuum and dosing valves…). Gas flows in microsystems are often in the slip flow regime, characterized by a moderate rarefaction with a Knudsen number of the order of 10-2 - 10-1. In this regime, velocity slip and temperature jump at the walls play a major role in heat transfer. This keynote paper presents a state of the art review on convective heat transfer in microchannels, focusing on rarefaction and compressibility effects in the slip flow and early transition regimes. Analytical and numerical models are compared for various microchannel configurations and heat transfer conditions. The validity of simplifying assumptions is detailed and the role played by the kind of boundary conditions and the value of the accommodation coefficients is discussed. Biography: Stéphane Colin is a Professor of mechanical engineering at the National Institute of Applied Sciences (INSA), in the University of Toulouse, France. He obtained an Engineer degree from ENSEEIHT in 1987 and received his PhD in fluid mechanics from the Polytechnic National Institute of Toulouse in 1992. He created in 1999 the Microfluidics Group of the Hydrotechnic Society of France. He initiated and chaired the three Microfluidics French Conferences (?FLU'02, ?FLU'04 and ?FLU'06) and co-chaired the first Microfluidics European Conference (?FLU'08). His current research is mainly focused on gas microflows. He is the coordinator of the GASMEMS European Initial Training Network aimed at training young researchers in the field of rarefied gas flows in MEMS. In 2008, he received the Hydrotechnic Great Award from the Hydrotechnic Society of France. He is the author of more than 60 scientific papers and the co-author of two text books.
		Thomas Cubaud Presentation Title: Viscous core-annular flows in microfluidic chambers Abstract: The manipulation of highly viscous materials at the microscale is a key challenge for implementing lab on chips with the ability to manage a variety of complex and reactive fluids. We describe methods for producing and controlling high-viscosity fluid threads flowing in sheath of less viscous fluids, i.e., viscous core-annular flows, in microchannels. The self-lubrication property of multi-fluid flows having large viscosity contrasts offers a promising means for manipulating interfaces between "thick" and "thin" fluids and for reducing the hydraulic resistance in micro- and nanofluidic devices. In particular, we focus on the flow behavior of threads as they traverse diverging-converging slit microfluidic chambers. The alteration of convective time-scales using extensional microgeometries permits the manipulation of complex phenomena such as viscous buckling, wetting, and coalescence. We examine the interrelation between these phenomena that find use for passively enhancing mixing between miscible fluids and for initiating continuous emulsification processes between immiscible fluids having widely disparate viscosities. Biography: Thomas Cubaud is an Assistant Professor in the Department of Mechanical Engineering at Stony Brook University. He received his Ph.D. degree in Fluid Dynamics from Paris-Sud University for his work on the wetting and dewetting of patterned surfaces at ESPCI, Paris, France, in 2001. Dr. Cubaud spent three years as a Postdoctoral Research Scientist with the Department of Mechanical and Aerospace Engineering at UCLA where he studied the motion of gas bubbles in microchannels to optimize the performance of micro direct methanol fuel cells. He also spent two years as a Postdoctoral Research Scientist with the Department of Chemistry and Biochemistry at UCLA conducting research on microscale hydrodynamic instabilities between high-viscosity fluids. Dr. Cubaud was the recipient of the 2006, 2007, and 2009 Annual Gallery of Fluid Motion Awards and the 2006 UCLA Chancellor's Award for Postdoctoral Research.
		David Erickson Abstract: In this talk I will describe our research into the use of microfluidics for enabling reconfigurability of photonic systems and matter itself. In the first of these systems it is well known that optical devices which incorporate liquids as a fundamental part of the structure can be traced at least as far back as the 18th century where rotating pools of mercury were proposed as a simple technique to create smooth mirrors for use in reflecting telescopes. The development of modern microfluidic and nanofluidic devices has enabled a present day equivalent of such devices centered on the marriage of fluidics and optics which we refer to as "Optofluidics." I will demonstrate here the fundamental advantages of using microfluidics to create adaptable photonic materials and provide a few specific examples related to fluid based optical switches. In the second aspect I will introduce how we use microfluidics to create dynamically programmable self-assembling materials, or programmable matter. The uniqueness of the approach I will demonstrate is that it uses dynamically-switchable affinities between assembling components facilitating the assembly of irregular structures. Biography: Dr. David Erickson is an Assistant Professor in the Sibley School of Mechanical and Aerospace Engineering at Cornell University where his research involves the development and fundamental understanding of micro-, nano- and optofluidic devices for biomolecular detection, single molecule analysis, directed assembly and autonomous microsystems. Prior to joining the faculty in September 2005, Dr. Erickson was a postdoctoral scholar at the California Institute of Technology (2004-2005) and he received his Ph.D. degree from the University of Toronto in 2004. In 2007, Dr. Erickson received the DARPA-MTO Young Faculty Award and the Robert '55 and Vanne '57 Cowie Excellence in Teaching Award. He is currently an associate editor of the Journal Smart Materials and Structures and the Journal of Microfluidics and Nanofluidics. He is also Principal Investigator of the NSF Nanoscale Interdisciplinary Research Team "Nanoscale Photo-fluidic Devices for Biomolecular Analysis".
		Heinz Herwig and S. Schmandt Presentation Title: Loss coefficients in laminar flows: indispensable for the design of micro flow systems Abstract: The concept of head loss coefficients K for the determination of losses in conduit components is discussed in detail. While so far it has only been applied to fully turbulent flows it is extended here to also cover the laminar flow regime. Specific numbers of K can be determined by integration of the entropy production field (second law analysis). This general approach is discussed and illustrated for various conduit components. Biography: Prof. Herwig is the head of the Institute of Thermo-Fluid Dynamics of the TU Hamburg-Harburg/Germany since 1999. His field of interest are complex transfer processes in fluid mechanics and heat transfer, on the macro as well as on the micro scale. He is the author of more than 190 publications, most of them in international journals, including 8 books in the fields of Thermodynamics, Fluid Dynamics and Heat Transfer.
		Oleg Kabov Presentation Title: Two-phase flow regimes and interface instability in short rectangular mini and micro-channels Abstract: Gas-liquid and vapor-liquid flows exist in a wide variety of applications in both normal gravity and reduced gravity environments. In cooling systems of microelectronics the length of two-phase flow in the channels can be less than 1-10 cm. In micro systems and Lab-on-Chip devices zone of two-phase flow could be several centimeters or millimeters. The paper focuses on the recent progress that has been achieved by the authors in the two-phase flow regimes and interface instability through conducting experiments. Phase shift schlieren technique and fluorescence method have been used. Experiments with water in horizontal rectangular flat channels (height 0.2-2 mm and width 5 -40 mm) have been conducted. Thickness of liquid film in varied situations has been measured. Maps of flow regimes were plotted. The main regimes of two-phase flow in the channel include bubbly, slug, jet, stratified, churn and annular. It was found that stratified flow exists and stable in the channels with 0.2 mm height. The main reason for the transition from stratified film flow to other regimes of two-phase flow in a short rectangular mini-channel is instability of the fluid motion in the lateral sides of the channel. Biography: Professor Oleg A. Kabov graduated from the Tomsk Polytechnic State University, Russia, in 1978 and received the Ph.D. degree in the technical sciences from the Institute of Thermophysics, Siberian Branch of Russian Academy of Sciences (IT) in 1987. In 1999 he received the degree of Doctor of Sciences in Physics and Mathematics (habilitation) from the same institute. Since 1987, he has been the Head of Laboratory of Enhancement of Heat Transfer in IT (Novosibirsk). His current research interests include the areas of shear-driven and falling liquid films, cooling systems of microelectronics, physics of two-phase flows in microgravity, as well as convective and vapour space condensation. Since 1997 he has also been involved in an intensive collaboration with a Research Staff of the Universite Libre de Bruxelles and has been managing the "Two-Phase System Group" of the Microgravity Research Center of ULB. He is involved as a coordinator in the preparation of several experiments performed under microgravity conditions (Parabolic Flights, Sounding Rockets, International Space Station). He has authored and coauthored more than 180 papers in referred journals and conference proceedings and has delivered more than 50 keynotes, plenary, and invited lectures at technical conferences and institutions. Since 1994 he is serving as regional editor of the Journal of Enhanced Heat Transfer and since 2005 he is also co-director of the Heat Transfer International Research Institute of ULB and IT. In 2007 he has been granted the Diploma of Professor on thermal physics and thermal fluids science of Russian Academy of Sciences.
		Satish Kandlikar Biography: Satish Kandlikar is the Gleason Professor of Mechanical Engineering at RIT. He received his Ph.D. degree from the Indian Institute of Technology in Bombay in 1975 and has been a faculty there before coming to RIT in 1980. His current work focuses on the heat transfer and fluid flow phenomena in microchannels and minichannels. He is involved in advanced single-phase and two-phase heat exchangers incorporating smooth, rough and enhanced microchannels. He has published over 180 journal and conference papers. He is a Fellow member of ASME, Associate Editor of a number of journals including ASME Journal of Heat Transfer and Executive Editor of Heat Exchanger Design Handbook published by Begell House. He has received the RIT's Eisenhart Outstanding Teaching Award in 1997 and Trustees Outstanding Scholarship Award in 2006. Currently he is working on a DOE sponsored project on Fuel Cell water management under freezing conditions.
		Moo Hwan Kim Presentation Title:The effect of nanoscale surface modification on boiling heat transfer and CHF Abstract: Recently, there were lots of researches about enormous CHF enhancement with the nanofluid in pool boiling and flow boiling. It is supposed the deposition of nanoparticles on the heated surface is one of main reasons. In a real application, nanofluids has a lot of problems to be used as the working fluid because of sedimentation and aggregation. The artificial surfaces on silicon and metal were developed to have the similar effect with nanoparticles deposited on the surface. The modified surface showed the enormous ability to increase CHF in pool boiling. Furthermore, under flow boiling, it had also good results to increase CHF. In these studies, we concluded that wetting ability of surface; e.g. wettability and liquid spreading ability (hydrophilic property of surface) was a key parameter to increase CHF under both pool and flow boiling. In addition, using wettability difference of surface; e.g. hydrophilic and hydrophobic, we conducted some tests of BHT (boiling heat transfer) enhancement using the oxide silicon which have micro-sized hydrophobic islands on hydrophilic surface. By using both of these techniques, we propose an optimized surface to increase both CHF and BHT. Also, the fuel surface of nuclear power plants is modified to have same effect and the results shows a good enhancement of CHF, too. Biography: Moo Hwan Kim is a professor of the department of mechanical engineering and dean of student and admission affairs at Pohang University of Science and Technology (POSTECH), South Korea. He received his Ph.D. from University of Wisconsin - Madison. He has been teaching at POSTECH since 1987. He specializes in phase change heat transfer and nuclear thermal hydraulics. Recently, he has been interested in nano fluids and boiling in a micro-channel. He served as a program director for nuclear technology program at Korea Science and Engineering Foundation from 2004 to 2006 and is currently a member of Korea Nuclear Council.
		Michael King Presentation Title: Nanoparticle-Coated Microtubes for the Manipulation of Cancer Cells Abstract: Formation of metastases by invasive transformed cells accounts for approximately 90% of all deaths in cancer patients. Our laboratory has developed new methods for the isolation of intact, viable cancer cells from patient blood samples, based on the physiological adhesion of selectin proteins in microscale flow devices. These cells can be maintained in culture for further study or drug screening, representing an exciting enabling technology for cancer research and treatment. More recently, we have found that monolayer coatings of colloidal nanoparticles, or naturally-forming halloysite nanotubes, can greatly improve the efficiency of cell capture and selective isolation of rare cell populations under flow. In related work, we have developed novel procedures for the packaging of siRNA genetic material into nanoscale liposomes, functionalizing the surface of these nanoparticles with biological adhesion molecules such as selectins, and then coating the interior surface of flow channels with this construct. When cells are perfused through the resulting device, e.g., blood or cancer cells, the targeted cells stick and roll on the device surface, take up the nanocapsules, and then ingest the genetic materials. In this manner, we have demonstrated effective gene delivery and targeted gene silencing in circulating cancer cells. Biography: MICHAEL R. KING, PHD, is an Associate Professor of Biomedical Engineering at Cornell University. King is an expert on the receptor-mediated adhesion of circulating cells, and has developed new computational and in vitro models to study the function of leukocytes, platelets, stem and cancer cells under flow. He is a former Whitaker Investigator, a James D. Watson Investigator of New York State, and an NSF CAREER Award recipient. King received the 2008 ICNMM Outstanding Researcher Award from the American Society of Mechanical Engineers, was the 2007-2008 Professor of the Year in Engineering at the University of Rochester, and received the 2009 Outstanding Contribution for a Publication in the International Journal Clinical Chemistry.
		Nikhil Koratkar Presentation Title: Wetting and Interfacial Phenomena in Nano and Micro Systems Abstract: The first part of my talk will discuss several types of nanostructured materials that are currently under development in our Lab. These include single-atom-thick graphene sheets, single-walled and multi-walled carbon nanotubes as well as metal and silicon based nanostructures. In particular, I will describe our approach to patterning these structures on 2-D substrates. In the second part of my talk, I will discuss how these patterned structures may be used to study the nature of the three-phase (gas-liquid-solid) interface in nano systems. At such small scales, surface forces such as capillarity, wetting and adhesion which are negligible in our ordinary world become dominant. I will show that these interfacial forces can be exploited in a clever way to achieve a number of objectives. These include design of biomimetic stable super-hydrophobic materials with two-tier (i.e. combined micro and nanoscale) surface roughness. Similarly I will show how super-hydrophilicity can be engineered via nano-patterning. I will demonstrate how the wettability of these nano/micro engineered surfaces can be manipulated by electro-wetting. I will discuss the transport of water through nanostructured membranes and how the transport may be precisely controlled by electro-chemical means. I will conclude with several practical applications of this technology. Biography: Nikhil Koratkar is a full professor in the Mechanical, Aerospace and Nuclear Engineering Department at Rensselaer Polytechnic Institute. Professor Koratkar's research interests are focused on the development and the characterization of advanced nanostructured materials and devices. He is a winner of the NSF CAREER Award and has over 55 archival journal publications in top ranked nanoscience journals including Nature, Nature Materials, Nano Letters, Advanced Materials and Small. He is an Associate Fellow of AIAA and an Associate Editor of Nanoscience and Nanotechnology Letters.
		Ralph Lindken Presentation Title: On the flow structure of two-phase flows in rectangular micro channels for lab on a chip and fuel cell applications Abstract: Digital microfluidics is a common method to move samples in lab on a chip applications. The reactants are moved in a train of dispersed droplets in a continuous carrier flow. Similar flow patterns occur in direct methanol fuel cells (DMFC), when CO2 bubbles are created as reaction product. In this talk we show simultaneous three-dimensional measurements of the flow inside the droplets and in the surrounding phase by means of scanning micro particle image velocimetry (microPIV) and we present the convection patterns of the two phases. The internal convection patterns are identified as the key parameter to manipulate samples. The internal convection patterns are controlled by the external flow of the continuous phase. The internal and the external flow patterns are linked by secondary vortices with about 1% of the absolute convection velocity. Changes in the viscosity ratio or the wettability alter the secondary vortices. It is planned to use these results to control mixing in digital microfluidics. In the second part of the presentation we show how digital microfluidics influences the stability of the flow in fuel cells. Biography: Ralph Lindken is head of the Microsystems and Fluid Mechanics group at the fuel cell research institute ZBT Duisburg at the University of Duisburg-Essen, Germany. He studied Mechanical Engineering at University of Bochum, Germany and Texas A&M University, USA. He obtained his PhD under the guidance of Prof. W. Merzkirch at the University of Essen, Germany. In 2001 he started a post-doctoral position at the Laboratory for Aero-and Hydrodynamics at the Delft University of Technology, Netherlands, and was Assistant Professor at same group from 2003 until 2009. His focus is on fundamental aspects of microfluidics and optical diagnostics for the investigation of microfluidic flows. Research topics are fundamental problems like the symmetry breaking of laminar micro-scale flow in symmetric geometries, biomedical applications like flow-induced mechanotransduction of cells and expression of genes, and flow stability and heat transfer in fuel cells. For the investigation of complex flows at microscales his group developed several novel experimental methods, such as microPIV for in-vivo applications, stereoscopic and holographic 3D-microPIV, TIRFM-PIV for the investigation of near-wall regions, microPIV for surface topography measurements on cells and LIF methods for scalar measurements.
		Yen-Wen Lu Presentation Title: Review of Nanoscale Surface Modification Techniques for Pool Boiling Enhancement Abstract: A series of new discovery to enhance boiling performance by nanostructured material will be examined. Since the mechanism of such phenomenon is not fully understood, this review mainly focuses on the implementation of different experimental methods as well as the interpretations of the mechanisms. Design consideration and theory development will be discussed, followed by practical aspects in this exciting field. Biography: Yen-Wen Lu received his Ph.D. in Mechanical and Aerospace Engineering from the University of California, Los Angeles (UCLA) in 2004. He received an M.S. from the University of Michigan and a B.S. from the National Taiwan University. He was in Mechanical and Aerospace Engineering Department and Institute for Advanced Materials, Devices, and Nanotechnology (IAMDN) at Rutgers University before he joined Microsystems Engineering Doctoral Program at Rochester Institute of Technology in 2007. He has received several awards, including FEAD Faculty Award, and Texas Instrument/Harvey Award. His research projects have been supported by federal agency and industrial company; they include microhand integration, wettability control, and optical device development. His research interests focus on the design, fabrication, and system integration in MEMS and nanotechnology.
		Shirish Mulay Presentation Title: A Pathway to Long Life Heaters in Inkjet Printers Abstract: The focus of this paper is on transient heat transfer and fluid flow in microchannels associated with the ink delivery system in an inkjet printhead. One of the critical aspects of the heater design is its life, which has improved significantly over the years in an attempt to provide cost-effective solutions to the customer. This paper discusses a pathway for longer life heaters through numerical simulation and experiments. Heater failure occurs due to various factors like thermal stresses, overdriving the heaters, electro-migration, cavitation, material degradation, and various interactions. The primary topic addressed in the paper is related to cavitation failure in heaters. The important parameters affecting this failure mode are discussed. It is also found that the microchannel geometry plays an important role in heater life. Biography: Shirish Mulay is a graduate of the Indian Institute of technology, Powai. He received his Bachelors & Masters degrees in Mechanical Engineering from Powai. Subsequently he received his Ph.D. from Illinois Institute of Technology in Mechanical and Aerospace Engineering. He has specialized in heat transfer and porous media. He taught for about eight years and for the last eleven years he has been working for Lexmark International (a printing company). He is a senior engineer at Lexmark and holds 6 patents (and another 6 patents are pending approval) in the area of Inkjet technology. He has published a number papers of and is a member of American Society of Mechanical Engineers and a member of Society for Imaging Science and Technology. He has chaired sessions in Electronics Cooling at ASME conferences for the last 12 years and has delivered a number of technology talks in USA and India.
		Pam Norris Presentation Title: Interfacial Phenomena at Micro and Nanoscale Abstract: The efficiency of thermal transport at interfaces is often a limiting factor for devices engineered at the nanoscale. Accurate prediction of thermal boundary conductance is an important step in ensuring that thermal processes do not limit device performance and reliability. In micro and nanoscale structures the resistance to thermal transport is dominated by a difference in vibrational spectrum for highly dissimilar materials and by the properties of the interface for more well matched structures. Current theories and experiments on the transport of thermal energy carriers at solid-solid interfaces are reviewed. Theoretical calculations, molecular dynamics (MD) simulations, and experimental evidence are used to examine the role of phonon scattering processes between materials. The assumptions made in the diffuse mismatch model (DMM) are reviewed for a variety of phonon scattering conditions and models are presented to account for the contribution of inelastic scattering events. In order to reconcile the disparity between predicted boundary conductance and experimental data, an investigation into the role of interfacial bonding and structure is presented. Various levels of interatomic mixing are studied through MD simulations and reviewed compared to experimental data. Biography: Pamela Norris is the founder and director of the University of Virginia's Nanoscale Energy Transfer Laboratory and the Aerogel Research Laboratory. After receiving her Ph.D. from Georgia Institute of Technology in 1992 working in the area of heat transfer in diesel engine cylinder heads, she developed her interests in microscale heat transfer while working in the laboratory of Chang-Lin Tien at the University of California at Berkeley. Pam then joined the Mechanical and Aerospace Engineering Department at UVA where she received a National Science Foundation CAREER award in 1995 and was promoted to Professor in 2004. She is a fellow of ASME, chairs the Education Committee of the ASME Nanotechnology Institute and is an Associate Editor of the ASME Journal of Heat Transfer and Nanoscale and Microscale Thermophysical Engineering. Pam is currently leading a team of 9 investigators on a Multi-University Research Initiative funded by the Office of Naval Research and also has research sponsored by DARPA, the Air Force Office of Science and Research, Boeing, and General Dynamics.
		Patrick Phelan Presentation Title: Photothermal Energy Conversion in Liquid Nanoparticle Suspensions Abstract: Liquid nanoparticle suspensions, popularly termed "nanofluids," have been the subject of numerous investigations because of their interesting thermal transport properties. Their propensity to scatter and absorb electromagnetic radiation enables other applications that can take advantage of both their radiative and thermal transport properties. In particular, we are working to develop direct-absorption solar thermal collectors in which nanofluids serve to absorb incident sunlight, thus heating the fluid directly and more efficiently than conventional solar collectors. Our experimental results, in which we irradiate nanofluids with a continuous-wave laser, demonstrate that boiling can be induced at lower incident light fluxes compared to a thin layer of pure water in front of a black absorptive backing. These findings suggest that improved solar energy conversion systems can be developed, including solar-driven direct-steam generators and thermochemical reactors. Biography: Pat Phelan received his BS from Tulane University, his MS from MIT, and his PhD from UC Berkeley, all in mechanical engineering. Following a pleasant two years as a JSPS Post-Doctoral Fellow at the Tokyo Institute of Technology, he joined the University of Hawaii as a faculty member in mechanical engineering, before moving to Arizona State University (ASU) in 1996. From 2006 - 2008 he served as the Director of the Thermal Transport Processes Program at the National Science Foundation, after which he returned to ASU, where he is now Professor and Graduate Program Chair for the School of Mechanical, Aerospace, Chemical & Materials Engineering. He has authored or co-authored more than 75 refereed journal articles, was a co-recipient of a Best Paper award at the 2007 Energy Sustainability Conference, and received the NSF CAREER Award.
		Liao Qiang Presentation Title: Flow and Heat Transfer in Micro and Mini Non-Circular Channels Abstract: Micro and mini non-circular channels are extensively employed in MEMS (Micro-Electro-Mechanical Systems), compact heat exchangers, micro heat sinks and micro heat pipe etc. for performance enhancement of microelements. Meanwhile, the limitation of micro fabrication technology also produces a great deal of micro and mini non-circular channels in practical applications. It has been testified by numerous experiments that micro and mini non-circular channels exhibit distinct flow and heat transfer behaviors from micro and mini circular channels, resulted from the corner effect, surface tension effect, and uneven velocity and temperature profile. In this talk we highlight two-phase flow, film condensation, electro-osmotic flow, slip flow and heat transfer in micro and mini non-circular channels. We will present our finished numerical simulation work on Taylor bubble rising in a vertical mini non-circular channel filled with a stagnant liquid, film condensation heat transfer inside vertical mini triangular channels, electro-osmotic flow of liquid in micro non-circular channels, gas slip flow and heat transfer in microchannel of arbitrary cross section under arbitrary thermal boundary conditions and dynamics of a water droplet subjected to air flow in the bulk of non-circular microchannel. The respective theoretical modeling, algorithm method and main simulation results for the research above will be presented. Biography: Dr. Liao received B.S. (1985) in Power Engineering from the Huazhong University of Science and Technology and Ph. D (1993) in Engineering Thermophysics from the Chongqing University, China. He joined Chongqing University in 1993, and undertook postdoctoral research in the Hong Kong University of Science and Technology from 1997 to 1999 and joint research in the University of Tennessee as an advanced visiting scholar from 2008 to 2009. Currently, he is a professor in College of Power Engineering, Chongqing University, China. Dr. Liao has extensive experiences in both theoretical and experimental heat transfer and fluid dynamics. The research activities include interfacial phenomena, phase-change heat transfer, microscale heat/mass transfer, and multiphase flow as well as fuel cells and biohydrogen production.
		Marion Ritzi-Lehnert Presentation Title: Entering a new era of diagnosis Abstract: Applying microtechnology and microfluidics in particular has the potential to make a major contribution to decentralising and simplifying medical/diagnostic testing. Lab-on-a-Chip systems that integrate several lab functions within a single polymer substrate open up new perspectives with respect to early diagnosis, disease therapy and monitoring of infectious, autoimmune and cancer diseases. Automated analysis of complex fluids with high efficiency and speed by non-skilled operators lead to time and labour saving tools for primary use within medical practice, clinical oncology and speciality laboratories. Transferring analysis of biological samples into microfluidic systems is not trivial, due to the complexity of the samples. Required sensitivity and specificity as well as time to result and envisaged costs significantly determine the choice of technologies to be applied. Two major carriers of information are present in biological samples - nucleic acids and proteins. In order to get access to the information needed the carriers have to be separated, isolated, concentrated, purified, amplified, modified and finally detected and analysed. Sample preparation thereby plays a major role but not astonishingly, most current micro total analysis systems (µTAS) still start analysis from a pre-treated sample. The multitude of required functionalities, the resulting complexity of integration and a standardisation level that still needs to be improved clearly indicate that the development of highly integrated LoC systems still requires considerable R&D efforts until maturity is achieved. An insight in recent developments as well as in the occurring challenges in establishing integrated micro total analysis systems will be given. Besides cardiovascular diseases and cancer which are at present the highest causes of death in the world infectious diseases, like aftosa or the bird or swine flue, show up again and again and demonstrate the need for new fast and efficient point-of-care analysis tools. Therefore, the development of cheap and fast technologies for diagnosis and therapy monitoring is one of the most challenging topics in modern medical science. Biography: Dr. Marion Ritzi-Lehnert studied chemistry at University of Konstanz and obtained her PhD in biology in 2000 in the field of the initiation of DNA-replication. During a Postdoc position at the GSF-society for environment and health in Munich she expanded her broad experience in biochemistry, molecular biology and micro-biology. In September 2003 she joined the Institut fuer Mikrotechnik Mainz GmbH (IMM), became head of the Fluidics Group in November 2004 and of the new established Biology Group in April 2006. Since beginning of 2008 she is head of the department "Fluidics and Simulation". She works on the development of microfluidic based (bio)analytical systems, with a focus on diagnostic point of care devices, bringing together applied science and engineering.
		Shin-ichi Satake Presentation Title: Three-dimensional Measurements of Micro-flow by Micro-digital-holographic-PTV Abstract: A micro-digital-holographic particle-tracking velocimetry (micro-DHPTV) method for high time-resolution flow field measurement in a micro-channel is developed. The system consists of an objective lens, a high-speed camera and a single high-frequency double pulsed laser. Particle positions in a three-dimensional field can be reconstructed by a digital hologram. The time evolution of a three-dimensional water flow in a semicircular micro-channel of 100-micro meter width and 40-micro meter depth is obtained successfully using this micro-DHPTV system. Consequently, 130 velocity vectors in the semicircular micro-channel can be obtained instantaneously. Biography: Shin-ichi Satake received his doctorate from The University of Tokyo in Mechanical Engineering in 1995. On a post-doc at The University of Tokyo, he studied the turbulent control via direct numerical simulation (DNS). He has been at Tokyo University of Science in Department of Applied Electronics as an assistant professor since 2002, and currently as an Associate Professor. Prior to joining Tokyo University of Science he was with Kogakuin University and Toyama University, where he conducted research in the areas of turbulence simulation and molecular dynamics as assistant Professor. Over the past 10 years, his research subjects have been expanded for many fields based on numerical simulation technique. It has been not only developing of numerical simulations technique but also developing of new experimental technique (Digital hologram) about fluid dynamics in macro- and micro-scale.
		David Sinton Presentation Title: Nanofluidics meets Plasmonics: Flow-Through Surface-Based Sensing Abstract: Nanostructures exhibit both nanofluidic and nanophotonic phenomena that can be exploited in sensing applications. In the case of nanohole arrays, the role of surface plasmons on resonant transmission motivates their application as surface-based biosensors. Research to date, however, has focused on dead-ended (or 'blind') holes, and therefore failed to harness the benefits of nanoconfined transport combined with plasmonic sensing. A flow-through nanohole array format presented here enables biomarker sieving and rapid transport of reactants to the sensing surface. Proof of concept operation is demonstrated and compared with previous methods. The various transport mechanisms are characterized with the aim to utilize the metallic plasmonic nanostructure as an active element in concentrating as well as detecting analytes. Biography: Prof. David Sinton's research interests are in microfluidics and nanofluidic transport phenomena and their application in biomedical and energy systems. He received a B.A.Sc. from the University of Toronto, M.Eng. from McGill University and Ph.D. from University of Toronto. Dr. Sinton is an Associate Professor in Mechanical Engineering at the University of Victoria. He has published over 50 journal papers and holds the Canada Research Chair in Integrated Microfluidics and Nanofluidics. He is currently on sabbatical and a Visiting Associate Professor at Cornell University.
		David Tees Presentation Title: Neutrophil motion, adhesion and activation in an in vitro micropipette model of a lung capillary Abstract: Leukocyte sequestration in lung capillaries is a key step in the inflammatory response to lung infection. P-selectin and ICAM-1 have well defined roles in leukocyte adhesion in systemic venules but their role in pulmonary capillaries is still unclear. Here, a novel in vitro Micropipette Cell Adhesion Assay (MCAA) used P-selectin, ICAM-1 or BSA coated capillary-sized glass microvessels as an in vitro model for a pulmonary capillary. Leukocytes were aspirated into adhesion molecule-coated micropipettes of varying diameters. Cell velocities and activation times were determined under pressures representative of lung capillaries. Neutrophil velocities in MCAA were significantly lower on P-selectin than BSA and decreased with increasing P-selectin concentration. Pre-treating P-selectin-coated microvessels with an anti-P-selectin mAb resulted in a increase in velocity. ICAM-1 expressed alone or with P-selectin, does not mediate adhesion of unstimulated neutrophils in pulmonary capillary geometry. These results demonstrate that P-selectin at low density mediates leukocyte adhesion in the pulmonary capillary geometry. The effect of micropipette size on activation time in the presence of these adhesion molecules will also be described. This work was supported by grant BES-0547165 from the National Science Foundation. Biography: Dr. Tees' work in experimental biophysics concerns how nanoscale interactions between adhesive proteins and carbohydrate molecules mediate microscale adhesive behavior in blood cells. He received a Ph.D. from McGill University in Montreal based on work on particle and cell adhesion in Poiseuille flow with Harry Goldsmith at the Montreal General Hospital Research Institute. Following postdoctoral work (at Cornell University and the University of Pennsylvania) with Daniel Hammer on the biophysics of cell adhesion, Dr. Tees joined the Physics & Astronomy Department at Ohio University in 2001 where he is currently an Associate Professor. He was awarded a National Science Foundation CAREER grant in 2006.
		Dimitris Valougeorgis Presentation Title: Simulation of gaseous microscale transport phenomena via kinetic theory Abstract: Kinetic theory of gases, as described by the Boltzmann or model kinetic equations, provides a solid theoretical approach for solving microscale transport phenomena in gases. These days, due to significant advancement in computational kinetic theory and due to the availability of high speed parallel computers, kinetic equations may be solved numerically with modest computational effort. In this framework, an upgraded discrete velocity algorithm for solving kinetic equations is presented. In addition, its applicability in simulating efficiently and accurately multidimensional micro flow and heat transfer problems is demonstrated. Based on the proposed algorithm, several microscale transport phenomena, vanishing at the hydrodynamic limit, are discussed. Analysis and results are valid in the whole range of the Knudsen number. Biography: Prof. Dimitris Valougeorgis received his diploma in Mechanical Engineering from the Aristotelion University of Thessaloniki, Greece in 1980. He received his M.S. and Ph.D. degrees in Mechanical Engineering from the Virginia Polytechnic Institute and State University in 1982 and 1985 respectively. From 1985 to 1987 he joined the Department of Mathematics of VPI&SU as a Visiting Assistant Professor, having in parallel a research appointment at the Center for Transport Theory and Mathematical Physics. From 1989 to 1998, he has worked as a senior engineer in Hellenic Petroleum S.A., Greece. Since Sept. 1998 he has been at the Department of Mechanical Engineering of the University of Thessaly in Volos, Greece. He currently is Professor of Mesoscale Methods in Flows and Transport Phenomena. His research interests are in the fields of kinetic theory of gases, rarefied gas dynamics and non-equilibrium transport phenomena with applications in micro-fluidics and vacuum technology. He has published more than 40 research articles in top peer reviewed journals and 100 articles in reviewed proceedings of conferences.
		Chi-Chuan Wang Abstract: Air cooling is by far the most popular thermal management of electronics for its simplicity and low cost. The considerable low thermal conductivity for air inevitably results in a very low heat transfer coefficient. As a consequence, the general approach for heat transfer improvement is using smaller fin spacing to accommodate more fin surface. However, a limitation is imposed on this conventional approach when the fin spacing is small and the operation speed is low. Normally the heat transfer performance is low due to fully developed flow. One way to augment the heat transfer performance is via boundary layer restarting incorporating interrupted surfaces like slit or louver. However, as pointed out by Yang et al. [1] and Webb and Trauger [2], typical interrupted surfaces like louver fin shows appreciable degradation in low velocity region pertaining to the "duct flow" phenomenon. Moreover, the interrupted surfaces often accompany with a very high pressure drop penalty. The results imply a difficult situation of heat transfer augmentation occurring at a low velocity having smaller fin spacing. In this region (a small fin spacing operated at a low Reynolds number), appreciable augmentation is hard to achieve. One of the alternatives to tailor this problem is to introduce swirl flow and destabilized flow field, and the common way for doing this is using vortex generators [3]. Unfortunately, there is still limitation to this approach since a smaller fin spacing may prevent the formation of vortex. In this paper, in association with the applications of electronic cooling, an overview of some possible augmentations alongside fin surface subject to the compact fin spacing is made, with efforts stressing upon their success and limitation. In the meantime, some promising designs featuring non-uniform placement of protruded dimples are proposed to lift the constraints of common augmentations. With certain arrangements of a few protruded dimples on the fin surfaces, the heat transfer coefficient is about 20~25% higher than that of plain fin geometry while the incurred pressure drop is 5~10% lower than that of plain fin geometry Biography: Dr. Chi-Chuan Wang obtained his B.S., M.S., and Ph.D. all in mechanical engineering from National Chiao-Tung University, Hsinchu, Taiwan during 1978~1989. After earning his Ph.D. in 1989, he joined the Energy & Environment Research Lab. of Industrial Technology Research Institute (ITRI, a non-profit applied research organization with 5500 employees), Hsinchu, Taiwan as a researcher, conducting services to industry applicable to Electronic Cooling, HVAC&R, and Microfludic systems. In addition to the industrial service, Dr. Wang is also active in the researches. He is the author or co-author of approximately 300 archival technical publications in English (including over 180 Int. Journal publications). He was promoted to the senior researcher of ITRI in 1997 and became the senior lead researcher from 2005 to early 2010. He then retired from ITRI in early 2010 and joined the faculty of Mechanical Engineering Department of National Chiao Tung University also at Hsinch, Taiwan as a professor. His research areas include enhanced heat transfer, multiphase system, heat pump technology, microscale heat transfer, and membrane separation. He is also a regional editor of the Journal of Enhanced Heat Transfer and an associate editor of Heat Transfer Engineering. He is also a Fellow of ASME and a Fellow of ASHRAE.
		Charles Ward Presentation Title: Dependence of the contact angle on the absorption at the solid-liquid interface Abstract: When the liquid and vapour phases of a substance are con_ned in a small diameter tube (Bond number < 1) that has smooth, homogeneous walls, the contact angle has been observed to be very sensitive the liquid phase pressure at the three-phase line. For example, for water in a borosilicate glass tube maintained isothermal, an increase in the liquid-phase pressure of 234 Pa increased the contact angle by more than 79°. The source of contact angle dependence on the liquid-phase pressure is suggested to be adsorption at the solid-liquid interface. Tension in the three-phase line could not play a role in these observations, since it acts perpendicular to the rigid tube walls. Since the contact angle depends on pressure, it cannot be viewed as a material property of solid-uid combination: for a given solid-uid combination, the value of the contact angle can be increased by increasing the liquid-phase pressure. For sessile droplets, line tension could play a role in determining the contact angle, but if the adsorption is taken into account, the observed dependence of the contact angle on the curvature of the three-phase line is fully accounted for without the introduction of line tension, even for nano- sized droplets. Biography: Charles Ward and his students have developed a method for determin- ing the surface tension of solids. For a particular solid-vapour combination, quantum and statistical mechanics were used to formulate the expression for an adsorption isotherm that is valid throughout the pressure range from near zero to the saturation-vapour pressure. By comparing the isotherm relation to adsorption measurements as a function of pressure, the parameters in the 1 solid-vapour isotherm relation may be determined. When this isotherm re- lation is added to Gibbsian thermodynamics, an expression for the surface tension of solid-vapour interface as a function of the vapour-phase pressure is obtained this in terms of the isotherm parameters and the liquid-vapour surface tension. This method received strong experimental support when it was shown it could be used to predict a material property of a solid, the surface tension of a solid in the absence of adsorption.
		Leslie Yeo Presentation Title: Fast Inertial Microfluidic Actuation and Manipulation Using Surface Acoustic Waves Abstract: Though uncommon in most microfluidic systems due to the dominance of viscous and capillary stresses, it is possible to drive microscale fluid flows with considerable inertia using surface acoustic waves (SAWs), which are nanometer order amplitude electro-elastic waves that can be generated on a piezoelectric substrate. Due to the confinement of the acoustic energy to a thin localized region along the substrate surface and its subsequent leakage into the body of liquid with which the substrate comes into contact, SAWs are an extremely efficient mechanism for driving fast microfluidics. We demonstrate that it is possible to generate a variety of efficient microfluidic flows using the SAW. For example, the SAWs can be exploited to pump liquids in microchannels or to translate free droplets typically one or two orders of magnitude faster than conventional electroosmotic or electrowetting technology. In addition, it is possible to drive strong microcentrifugation for micromixing and bioparticle concentration or separation. In the latter, rich and complex colloidal pattern formation dynamics have also been observed. At large input powers, the SAW is a powerful means for the generation of jets and atomized aerosol droplets through rapid destabilization of the parent drop interface. In the former, slender liquid jets that persist up to centimeters in length can be generated without requiring nozzles or orifices. In the latter, a monodispersed distribution of 1-10 micron diameter aerosol droplets is obtained, which can be exploited for drug delivery and encapsulation, nanoparticle synthesis, and template-free polymer array patterning. Biography: Dr Leslie Yeo is an Australian Research Fellow and Senior Lecturer in the Department of Mechanical & Aerospace Engineering and Co-Director of the Micro/Nanophysics Research Laboratory at Monash University, Australia. He received his PhD from Imperial College London in 2002, for which he was awarded the Dudley Newitt prize for a computational/theoretical thesis of outstanding merit. Prior to joining Monash University, he was a Mathematical Modeller at Det Norske Veritas UK and a postdoctoral research associate in the Department of Chemical & Biomolecular Engineering at the University of Notre Dame, USA. Dr Yeo was the recipient of the 2007 Young Tall Poppy Science Award from the Australian Institute for Policy & Science 'in recognition of the achievements of outstanding young researchers in the sciences including physical, biomedical, applied sciences, engineering and technology', and a finalist in the 2008 Eureka Prize People's Choice Award. Dr Yeo is the co-author of the book 'Electrokinetically Driven Microfluidics and Nanofluidics' currently being published by Cambridge University Press and is Co-Editor of the American Institute of Physics journal Biomicrofluidics (http://bmf.aip.org).