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-   -   User Defined Scalar (UDS) For Electric Potential (http://www.cfd-online.com/Forums/fluent/115412-user-defined-scalar-uds-electric-potential.html)

A CFD free user March 30, 2013 08:22

User Defined Scalar (UDS) For Electric Potential
 
Hello Folks
I want to define two electric and protonic potentials inside a fuel cell using UDS. Here's the problem: when I define electric field, then it's required to define UDS diffusion coefficient which is in fact, electrical conductivity and has a dimension just (1/ohm.m) and it's different from UDS diffusivity coefficient exist in material panel which is (kg/m.s). How can handle this problem? Furthermore, in material panel there are also other parameters such as density or viscosity and etc. what should I do with them for UDS? Should I actually use material panel for this purpose?
Please give me some advice.
Thank you in advance.


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