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020 _a9781118298411
020 _a9781118298428
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100 1 _aPanigrahi, Pradipta Kumar,
_0http://id.loc.gov/authorities/names/nb2012026783
_eauthor.
245 1 0 _aTransport phenomena in microfluidic systems /
_cPradipta Kumar Panigrahi.
264 1 _aSingapore :
_bWiley,
_c[2015]
264 4 _c2016.
300 _a1 online resource.
336 _atext
_btxt
_2rdacontent.
337 _acomputer
_bc
_2rdamedia.
338 _aonline resource
_bcr
_2rdacarrier.
340 _2rdacc
_0http://rdaregistry.info/termList/RDAColourContent/1003.
504 _aIncludes bibliographical references and index.
505 0 _aTable of Contents About the Author xv Preface xvii Acknowledgement xix List of Figures xxi List of Tables xxxvii 1 Introduction 1 1.1 History 1 1.2 Definition 2 1.3 Analogy of Microfluidics with Computing Technology 2 1.4 Interdisciplinary Aspects of Microfluidics 3 1.5 Overall Benefits of Microdevices 6 1.6 Microscopic Scales for Liquids and Gases 10 1.7 Physics at Micrometric Scale 11 1.8 Scaling Laws 13 1.9 Shrinking of Human Beings 19 2 Channel Flow 23 2.1 Introduction 23 2.2 Hydraulic Resistance 23 2.3 Two Connected Straight Channels 24 2.4 Equivalent Circuit Theory 26 2.5 Reynolds Number 27 2.6 Governing Equation for Arbitrary-Shaped Channel 30 2.7 Summary of Hydraulic Resistance in Straight Channels 40 2.8 Viscous Dissipation of Energy 41 2.9 Compliance 45 3 Transport Laws 51 3.1 Introduction 51 3.2 Boundary Slip 51 3.3 Slip Flow Boundary Condition in Gases 52 3.4 Slip Flow Boundary Condition in Liquids 57 3.5 Physical Parameters Affecting Slip 66 3.6 Possible Liquid Slip Mechanism 67 3.7 Thermal Creep Phenomena 68 3.8 Couette Flow with Slip Flow Boundary Condition 70 3.9 Compressibility Effect in Microscale Flows 74 3.10 Slip Flow between Two Parallel Plates 78 3.11 Fluid Flow Modeling 81 4 Diffusion, Dispersion, and Mixing 101 4.1 Introduction 101 4.2 RandomWalk Model of Diffusion 101 4.3 Stokes–Einstein Law 103 4.4 Fick's Law of Diffusion 103 4.5 Diffusivity and Mass Transport Nomenclature 104 4.6 Governing Equation for Multicomponent System 105 4.7 Characteristic Parameters 107 4.8 Diffusion Equation 109 4.9 Taylor Dispersion 113 4.10 Micromixer 117 4.11 Convective Diffusion 123 4.12 Detailed Analysis 127 4.13 Reverse Osmosis 135 5 Surface Tension-Dominated Flows 149 5.1 Surface Tension 149 5.2 Gibbs Free Energy and Surface Tension 151 5.3 Microscopic Model of Surface Tension 151 5.4 Young–Laplace Equation 152 5.5 Contact Angle 154 5.6 Dynamic Contact Angle 156 5.7 Superhydrophobicity and Superhydrophilicity 158 5.8 Microdrops 163 5.9 Capillary Rise and Dimensionless Numbers 166 5.10 Coating Flows 169 5.11 Enhanced Oil Recovery 171 5.12 Classification of Surface Tension Gradient-Driven Flow 172 5.13 Boundary Conditions 173 5.14 Thermocapillary Motion 174 5.15 Diffusocapillary Flow 177 5.16 Electrowetting 178 5.17 Marangoni Convection in Drops 181 5.18 Marangoni Instability 182 5.19 Micropropulsion System 184 5.20 Capillary Pump 186 5.21 Thermocapillary Motion of Droplets 188 5.22 Thermocapillary Pump 189 5.23 Taylor Flows 192 5.24 Two-Phase Liquid–Liquid Poiseuille Flow 197 5.25 Hydrodynamics of Taylor Flow 199 5.26 Plug Motion in Capillary 201 5.27 Clogging Pressure 203 5.28 Digital Microfluidics 206 6 Charged Species Flow 213 6.1 Introduction 213 6.2 Electrical Conductivity and Charge Transport 214 6.3 Electrohydrodynamic Transport Theory 217 6.4 Electrolytic Cell Example 220 6.5 The Electric Double Layer and Electrokinetic Phenomena 226 6.6 Debye Layer Potential Distribution 228 6.7 Electrokinetic Phenomena Classification 232 6.8 Electroosmosis 233 6.9 Exact Expression for Cylindrical Channel EO Flow 237 6.10 EO Pump 242 6.11 EO Flow in Parallel Plate Channel 249 6.12 Electroosmosis and Forced Convection 252 6.13 Electrophoresis 255 6.14 Dielectrophoresis 259 6.15 Polarization and Dipole Moments 260 6.16 Point Dipole in a Dielectric Fluid 262 6.17 Dielectric Sphere in a Dielectric Fluid: Induced Dipole 264 6.18 Dielectrophoretic Force on a Dielectric Sphere 265 6.19 Dielectrophoretic Trapping of Particles 266 6.20 AC Dielectrophoretic Force on a Dielectric Sphere 268 7 Magnetism and Microfluidics 277 7.1 Introduction 277 7.2 Magnetism Nomenclature 277 7.3 Magnetic Beads 280 7.4 Magnetic Bead Characterization 280 7.5 Magnetostatics 282 7.6 Magnetophoresis 283 7.7 Magnetic Force on Particles 286 7.8 Magnetic Particle Motion 287 7.9 Magnetic Field Flow Fractionation 290 7.10 Ferrofluidic Pumps 293 7.11 Magnetic Sorting and Separation 294 7.12 Magneto-Hydrodynamics 295 7.13 Governing Equations for MHD 296 8 Microscale Conduction 303 8.1 Introduction 303 8.2 Energy Carriers 304 8.3 Scattering Mechanism 305 8.4 Nonequilibrium Conditions 306 8.5 Time and Length Scales 306 8.6 Scale Effects 307 8.7 Fourier’s Law 309 8.8 Hyperbolic Heat Conduction Equation 310 8.9 Kinetic Theory 314 8.10 Heat Capacity 316 8.11 Boltzmann Transport Theory 322 8.12 Microscale Two-Step Models 326 8.13 Thin Film Conduction 327 9 Microscale Convection 331 9.1 Introduction 331 9.2 Scaling Analysis 331 9.3 Laminar Fully Developed Nusselt Number 334 9.4 Why Microchannel Heat Transfer 334 9.5 Gases versus Liquid Flow in Microchannels 335 9.6 Temperature Jump 336 9.7 Couette Flow with Viscous Dissipation 340 9.8 Isothermal Parallel Plate Channel Flow without Viscous Heating 343 9.9 Large Parallel Plate Flow without Viscous Heating: Uniform Surface Flux 346 9.10 Fully Developed Flow in Microtubes: Uniform Surface Flux 352 9.11 Convection in Isothermal Circular Tube with Viscous Heating 358 9.12 Flow Boiling Heat Transfer in Mini-/Microchannels 361 9.13 Condensation Heat Transfer in Mini-/Microchannel 368 10 Microfabrication 375 10.1 Introduction 375 10.2 Microfabrication Environment 376 10.3 Functional Materials 377 10.4 Surface Preparation 383 10.5 General Micromachining Procedure 384 10.6 Photolithography 386 10.7 Subtractive Techniques 391 10.8 Additive Techniques 399 10.9 Example of a Silicon Membrane Fabrication 403 10.10 PDMS-Based Molding 404 10.11 Sealing 407 10.12 Laser Microfabrication Techniques 409 11 Microscale Measurements 417 11.1 Introduction 417 11.2 Microscale Velocity Measurement 417 11.3 PIV Fundamentals 418 11.4 Micro-PIV System 427 11.5 Temperature Measurement 437 12 Microscale Sensors and Actuators 455 12.1 Introduction 455 12.2 Flow Control 455 12.3 Actuator Classification 458 12.4 Shear Stress Sensors 468 12.5 Classification of Shear Stress Sensors 470 12.6 Calibration of Shear Stress Sensors 480 12.7 Uncertainty and Noise 485 13 Heat Pipe 487 13.1 Introduction 487 13.2 Applications of Heat Pipe 487 13.3 Advantages of Heat Pipe 488 13.4 Heat Pipe Operation 488 13.5 Wick Structure 489 13.6 Working Fluids and Structural Material of Heat Pipe 491 13.7 Operating Temperature of Heat Pipe 492 13.8 Ideal Thermodynamic Cycle of Heat Pipe 493 13.9 Microheat Pipe 493 13.10 Effective Thermal Conductivity 495 13.11 Operating Limits 495 13.12 Cleaning and Charging 506 Reference 506 Supplemental Reading 506 Index 507
545 0 _aAbout the Author Pradipta Panigrahi is a professor and head of the Centre for Laser Technology, IIT Kanpur. He obtained his PhD in Mechanical Engineering from Louisiana State University, USA, in 1997. He was awarded a master degree at Louisiana State University in mechanical engineering in 1993 and another master in system science in the same institution in 1997. He obtained his B.Sc degree in echanical engineering at UCE Burla, Sambalpur University, India. His areas of interest include optical techniques, turbulence, hot wire anemometry, Color Schlieren and design of thermal systems. He has published over 100 international journals, books and conference proceedings on a range of subjects including digital holography, particle image velocimetry, laser interferometry, liquid crystal thermography and soft computing based flow control. He was awarded the Swarnajayanti Fellowship by the Department of Science and Technology (India) in 2006. In 1981, Dr. Panigrahi was awarded the National Scholarship.
650 0 _aMicrofluidics.
_0http://id.loc.gov/authorities/subjects/sh2005000678.
650 0 _aTransport theory.
_0http://id.loc.gov/authorities/subjects/sh85137024.
655 4 _aElectronic books.
856 _uhttps://onlinelibrary.wiley.com/doi/book/10.1002/9781118298428
_yFull text is available at Wiley Online Library Click here to view
942 _2ddc
_cER