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-   -   How to define diffusivities in Fuel cell Model (http://www.cfd-online.com/Forums/fluent/43796-how-define-diffusivities-fuel-cell-model.html)

braket February 17, 2007 17:30

How to define diffusivities in Fuel cell Model
 
Hi, I am modeling PEMFC, and I am trying to define diffusivities for species. Species have different diffusivities in different zones. How do I use macro "DEFINE_DIFFUSIVITY" to define them in different zones? And how much are diffusivities of water and nitrogen? Who can give me an example? Thank you! braket

braket February 17, 2007 19:08

Re: How to define diffusivities in Fuel cell Model
 
In addition, I only find the diffusivities of oxygen, hydrogen in literatures, but water and nitrogen diffusivities can not be found. how do you define and input them in fuel cell model? Thank you very much!


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