Revised Formulation of Fick's, Fourier's, and Newton's Laws for Spatially Varying Linear Transport Coefficients | ACS Omega
Can somebody explain to me the 2 Fick's laws of diffusion? Where do they change? How do the formulas derive? I need a thorough explanation on the physical part, aka related to
![A Direct Derivation of Fick's Law from Continuity Equation for Interdiffusion in Multicomponent Systems - ScienceDirect A Direct Derivation of Fick's Law from Continuity Equation for Interdiffusion in Multicomponent Systems - ScienceDirect](https://ars.els-cdn.com/content/image/1-s2.0-S1359646221007089-ga1.jpg)