Anisotropic diffusion coefficient

[RemDelaporteMathurin]

Some applications may require an anisotropic diffusion coefficient.

It may be worth trying to implement that in FESTIM.

Some useful links:

• https://fenicsproject.discourse.group/t/anisotropic-heterogeneous-diffusion/10826

[KulaginVladimir]

@RemDelaporteMathurin What about other material properties, say, thermal conductivity?

[RemDelaporteMathurin]

@KulaginVladimir yes also! The same principle would apply!

I made a small example on how to achieve this in the fenicsx branch for a simple diffusion problem.

[RemDelaporteMathurin]

@KulaginVladimir there you go I adapted it to thermal conductivity https://github.com/RemDelaporteMathurin/FESTIM/blob/anisotropy/anisotropy_thermal.ipynb