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Mass Diffusion Coefficient-help needed

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Old   August 27, 2002, 12:53
Default Mass Diffusion Coefficient-help needed
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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.
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Old   August 28, 2002, 04:03
Default Re: Mass Diffusion Coefficient-help needed
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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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