Reply To: Anisotropic Species Diffusion term meaning in cell zone condition of Porous media

[Amine Ben Hadj Ali]

A) does depend if you want to account for direction dependent diffusion.
B) the terms in your equation are all built-in. If something is missing it can be added. If you want to know the background please refer to the mentioned references in the manual

C)manual is just a how to. Theory is found elsewhere.