Fick's First Law (1): Diffusion, Flux, and Concentration Gradients - YouTube
Example 17.2-2: Diffusion Through a Nonisothermal Spherical Film
Session 87: Diffusion Equation | Part B: Flux and the Divergence Theorem | 4. Triple Integrals and Surface Integrals in 3-Space | Multivariable Calculus | Mathematics | MIT OpenCourseWare