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-   -   Questions on Species Mass diffusion coefficient (http://www.cfd-online.com/Forums/fluent/47415-questions-species-mass-diffusion-coefficient.html)

Eddy February 22, 2008 19:06

Questions on Species Mass diffusion coefficient
 
I created a mixture material out of two fluid species: carbon and liquid iron. Carbon is the dilute and liquid iron is the solvent. In the materials panel, I got confused with the mass coefficient of species. I guess in my case only fickian diffusion exists since the carbon mass fraction is around 0.4%. But should I choose the dilute approximation or constant dilute approximation?

I prefer the dilute approximation but how can I specify the bulk species(liquid iron) in the mixture? I wonder if someone can give me a helping hand? Thanx!

eddy March 11, 2008 12:06

Re: Questions on Species Mass diffusion coefficien
 
nobody knows it?


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