How to write UDF to evaluate mass fraction gradient? -- CFD Online Discussion Forums

January 9, 2020, 07:09

How to write UDF to evaluate mass fraction gradient?

mariam.sara

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Join Date: Jan 2011

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Hey
I am working with species model within a cavity utilizing (air+H2O vapor) and I want to write a UDF to evaluate the mass fraction gradient which exists on the expression shown on the attached picture. Can anyone guide me how I can write the required UDF?

Thanks
Mariam

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