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Microfluidics

Microfluidics. Instructor: Dr. Ashis Kumar Sen, Department of Mechanical Engineering, IIT Madras. This is a basic course on microfluidics at the senior undergraduate and post-graduate level. It covers fundamentals of micro-scale flows and microfabrication. The course also includes design of microfluidic components and few applications of microfluidic systems. The fundamentals of fluid flows at micro-scale including intermolecular forces, low Re flows, slip theory, capillary flows and electrokinetics are discussed. The principles of microfabrication with silicon and polymer substrates are illustrated. Theory and design of various microfluidic components including micropumps, micromixers, microvalves etc is discussed. Few applications of microfluidic systems are also covered. (from nptel.ac.in)

Lecture 41 - Lab Demo

Go to the Course Home or watch other lectures:

Introduction

Lecture 01 - Introduction and Scaling

Lecture 02 - Scaling

Microscale Fluid Mechanics

Lecture 03 - Intermolecular Forces, States of Matter, Continuum Assumption

Lecture 04 - Governing Equations for Gas and Liquid Flows, Navier Boundary Conditions in Slip Theory

Lecture 05 - Slip Flow, Reynolds Number Flows, Exact Solutions to Some Basic Flow Situations

Lecture 06 - Couette Flow, Poiseuille Flow

Lecture 07 - Poiseuille Flow (cont.)

Lecture 08 - Two Phase Poiseuille Flow, Time-dependent Couette Flow

Lecture 09 - Hydraulic Resistance and Circuit Analysis

Lecture 10 - Hydraulic Resistance of 2 Channels Connected in Series

Capillary Flows

Lecture 11 - Surface Tension and Interfacial Energy, Young-Laplace Equation, Contact Angle

Lecture 12 - Capillary Length and Capillary Rise

Lecture 13 - Interfacial Boundary Conditions, Marangoni Force, Electrokinetics

Electrokinetics

Lecture 14 - Electroosmosis: Electrical Double Layer, Debye Huckel Approximation

Lecture 15 - Ideal Electroosmotic Flow, Electroosmotic Flow with Back Pressure

Lecture 16 - Electroosmotic Flow with Back Pressure (cont.), Electroosmotic Micropump

Lecture 17 - Cascade Electroosmotic Micropump (cont.), Electrophoresis, Dielectrophoresis

Lecture 18 - Dipole in an Electric Field, Dielectrophoretic Force

Lecture 19 - Dielectrophoresis Particle Trapping, AC Dielectrophoresis

Lecture 20 - Electrokinetics and Magnetophoresis

Microfabrication Techniques

Lecture 21 - Materials, Clean Room, Silicon Crystallography, Miller Indices, Photolithography

Lecture 22 - Photolithography (cont.), Oxidation, Etching, Wafer Bonding, Deposition Techniques

Lecture 23 - Deposition Techniques: Doping, Oxidation, Thermal Evaporation

Lecture 24 - Sputtering, Chemical Vapour Deposition, Bulk Micromachining

Lecture 25 - Surface Micromachining, Polymer based Fabrication

Lecture 26 - PMMA/PDMS Substrates, Micromolding, Hot Embossing, Fluidic Interconnections

Microfluidics Components

Lecture 27 - Overview of Micropumps, Check-valve Pumps

Lecture 28 - Valve-less Pumps, Rotary Micropumps, Ultrasonic Pumps, EHD Pumping

Lecture 29 - Electrokinetic Micropump, Magneto-hydrodynamic (MHD) Pumps

Lecture 30 - Capillary Filling Process, Transpiration Cooling, Peristaltic Pumps, Centrifugal Pumps

Lecture 31 - Overview of Microvalves, Pneumatic Microvalves, Thermopneumatic Microvalves

Lecture 32 - Thermomechanical valves, Bimetallic Valves, Piezoelectric Valves

Lecture 33 - Electrostatic Valves, Electromagnetic Valves, Electrochemical Valves

Lecture 34 - Micro Flow Sensors: Differential Pressure Flow Sensors, etc.

Lecture 35 - Examples of Micro Flow Sensors, Micro Mixers: Physics of Mixing

Lecture 36 - Micro Mixers: Sequential Lamination, Sequential Segmentation

Lecture 37 - Micro Droplets: Kinetics of a Droplet, Dynamics of a Droplet, Droplet Formation

Lecture 38 - Micro Reactors

Lecture 39 - Micro Needles and Microparticle Separation

Lecture 40 - Few Applications of Microfluidics

Lecture 41 - Lab Demo