Fields, Forces and Flows in Biological Systems
Lecture Notes
The following table presents slides for selected lectures in Parts 2 and 4, plus an introductory lecture in Part 1. Table entries for Parts 1 and 3 are retained, even though no lecture notes are available, to present the overall flow of topics during the term.
LEC # |
TOPICS |
DETAILS |
Part 1: Fluids (Instructor: Prof. Scott Manalis) |
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1 |
Introduction to the course Fluid 1: Introduction to fluid flow (PDF) |
Logistics Introduction to the course Importance of being "multilingual" Complexity of fluid properties |
2 |
Fluid 2: Drag forces and viscosity |
Fluid drag Coefficient of viscosity Newton's law of viscosity Molecular basis for viscosity Fluid rheology |
3 |
Fluid 3: Conservation of momentum |
Fluid kinematics Acceleration of a fluid particle Constitutive laws (mass and momentum conservation) |
4 |
Fluid 4: Conservation of momentum (example) |
Acceleration of a fluid particle Forces on a fluid particle Force balances |
5 |
Fluid 5: Navier-Stokes equation |
Inertial effects The Navier-Stokes equation |
6 |
Fluid 6: Flows with viscous and inertial effects |
Flow regimes The Reynolds number, scaling analysis |
7 |
Fluid 7: Viscous-dominated flows, internal flows |
Unidirectional flow Pressure driven flow (Poiseuille) |
8 |
Fluid 8: External viscous flows |
Bernoulli's equation Stream function |
9 |
Fluid 9: Porous media, poroelasticity |
Viscous flow Stoke's equation |
10 |
Fluid 10: Cellular fluid mechanics (guest lecture by Prof. Roger Kamm) |
How cells sense fluid flow |
Part 2: Fields (Instructor: Prof. Jongyoon Han) |
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11 |
Field 1: Introduction to EM theory (PDF) |
Why is it important? Electric and magnetic fields for biological systems (examples) EM field for biomedical systems (examples) |
12 |
Field 2: Maxwell's equations (PDF) |
Integral form of Maxwell's equations Differential form of Maxwell's equations Lorentz force law Governing equations |
13 |
Quiz 1 |
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14 |
Field 3: EM field for biosystems (PDF) |
Quasi-electrostatic approximation Order of magnitude of B field Justification of EQS approximation Quasielectrostatics Poisson's equation |
15 |
Field 4: EM field in aqueous media (PDF) |
Dielectric constant Magnetic permeability Ion transport (Nernst-Planck equations) Charge relaxation in aqueous media |
16 |
Field 5: Debye layer (PDF) |
Solving 1D Poisson's equation Derivation of Debye length Significance of Debye length Electroneutrality and charge relaxation |
17 |
Field 6: Quasielectrostatics 2 (PDF) |
Poisson's and Laplace's equations Potential function Potential field of monopoles and dipoles Poisson-Boltzmann equation |
18 |
Field 7: Laplace's equation 1 (PDF) |
Laplace's equation Uniqueness of the solution Laplace's equation in rectangular coordinate (electrophoresis example) will rely on separation of variables |
19 |
Field 8: Laplace's equation 2 (PDF) |
Laplace's equation in other coordinates (solving examples using MATLABĀ®) |
20 |
Field 9: Laplace's equation 3 (PDF) |
Laplace's equation in spherical coordinate (example 7.9.3) |
Part 3: Transport (Instructor: Prof. Scott Manalis) |
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21 |
Transport 1 |
Diffusion Stokes-Einstein equation |
22 |
Transport 2 |
Diffusion based analysis of DNA binding proteins |
23 |
Transport 3 |
Diffusional flux Fourier, Fick and Newton Steady-state diffusion Concentration gradients |
24 |
Transport 4 |
Steady-state diffusion (cont.) Diffusion-limited reactions Binding assays Receptor ligand models Unsteady diffusion equation |
25 |
Transport 5 |
Unsteady diffusion in 1D Equilibration times Diffusion lengths Use of similarity variables |
26 |
Transport 6 |
Electrical analogy to understanding cell surface binding |
27 |
Quiz 2 |
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28 |
Transport 7 |
Convection-diffusion equation Relative importance of convection and diffusion The Peclet number Solute/solvent transport Generalization to 3D |
29 |
Transport 8 |
Guest lecture: Prof. Kamm Transendothelial exchange |
30 |
Transport 9 |
Solving the convection-diffusion equation in flow channels Measuring rate constants |
Part 4: Electrokinetics (Instructor: Prof. Jongyoon Han) |
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31 |
EK1: Electrokinetic phenomena |
Debye layer (revisit) Zeta potential Electrokinetic phenomena |
32 |
EK2: Electroosmosis 1 (PDF) |
Electroosmotic flow Electroosmotic mobility (derivation) |
33 |
EK3: Electroosmosis 2 (PDF) |
Characteristics of electroosmotic flow Applications of electroosmotic flow |
34 |
EK4: Electrophoresis 1 |
Electrophoretic mobility Theory of electrophoresis |
35 |
EK5: Electrophoresis 2 (PDF) |
Electrophoretic mobility of various biomolecules Molecular sieving |
36 |
EK6: Dielectrophoresis (PDF) |
Induced dipole (from part 2) C-M factor Dielectrophoretic manipulation of cells |
37 |
EK7: DLVO (PDF) |
Problem of colloid stability Inter-Debye-layer interaction |
38 |
EK8: Forces |
Van der Waals forces Colloid stability theory |
39 |
EK9: Forces |
Summary of the course/evaluation |
Assignments
This page presents a few representative problem sets.
Problem Set 1 (PDF) - due at Ses# L5 (Fluid 5: Navier-Stokes equation)
Problem Set 4 (PDF) - due at Ses# L17 (Field 6: Quasielectrostatics 2)
Problem Set 10 (PDF) - due at Ses# L37 (EK7: DLVO)
Study Materials
Fluids Tutorial: Curl Divergence (PDF)
Fields Tutorial: FEMLAB Demo (PDF)
Final Exam Equations Sheet (PDF)