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-   -   Mass Diffusion Coefficient-help needed (https://www.cfd-online.com/Forums/fluent/30220-mass-diffusion-coefficient-help-needed.html)

Shankar August 27, 2002 12:53

Mass Diffusion Coefficient-help needed
 
For a multicomponent system where the mixture composition keeps changing(time -dependent) what model should I be using? The Fick's law or full multicomponent diffusion?Thanks.

Piran August 28, 2002 04:03

Re: Mass Diffusion Coefficient-help needed
 
It depends on your concentrations: if you are using tracer-components (very low concentrations) Fick's law applies. If your concentrations are high you need the multicomponent diffusion.


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