7.6.17.34.10. Ficks_Law

Syntax

Species Diffusion [{of} SpeciesName] = Ficks_Law ()

Scope

Aria Material

Summary

Generalized model for species diffusion - can use either a scalar or tensor species diffusivity. Identical to BASIC model.

Description

If a tensor species diffusivity $D_i$ is provided in the material model, the form of flux is

${\bf{J}} = -D_i \cdot \nabla S_i$

If the species diffusivity is given as a scalar $d_i$ then the heat flux is

${\bf{J}} = -d_i \nabla S_i$

Parameter	Value	Default
{of}	{of \| species \| subindex}	–
SpeciesName	string	–