[Golnaz]

Hi everyone,

i am tring to model a PEM fuel cell using fluent
i have gone through the related tutorial and the fuel cell manual.
I have a nonisotropic electrical conductivity.
we also i have specofic values for in plane and through plane electrical conductivity in unit on S/m.
what i understood, from the tutrial and the manual i would need to used UDS to be able to input the two values for electrical conductivity.

but, my problem is that when i try using UDS diffusivity with the orthogonal option the values that i can put in are in kg/ms!!! but the values that i have are in S/m(unit of electrical conductivity) !!!
I really dont understand how can i do that, it seems like am missing something, or misunderstanding some part.

whats more, i dont understand how the UDS diffusivity can be defined as the electrical conductiviy..

Any Input is much appreciated..

Many Thanks