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Mixture diffusion coefficient

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Old   December 7, 2017, 08:20
Default Mixture diffusion coefficient
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annan
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Hello everyone,

For my calculations I need to retrieve the mixture diffusion coefficient. It is defined as the following : D = x DL + (1-x) DG, where x is the liquid volume fraction and DL and DG are the diffusion coefficients in the liquid and in the gas respectively.

I am using a UDS to follow a scalar, and I thought of using C_UDSI_DIFF in my UDF to get the diffusion coefficient. The problem is that I get a segmentation error when I use this Macro.

If anyone can help me

Thank you very much
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fluent - udf, uds diffusive, uds diffusivity, vof multiphase

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