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How to use udf to write the gradient ,nabla and laplacian mathematial conventions?

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Old   May 11, 2021, 08:58
Question How to use udf to write the gradient ,nabla and laplacian mathematial conventions?
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WANG LU
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Hi, every one,
I need to write a new uds transport equation.And now,I was stuck by a question that I do not know how to compile the gradient,nabla,laplacian
mathematial conventions.I need to add a source term as the attached picture show.
Thank you for your help.
Best wishes!
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File Type: jpg _20210511205140.jpg (27.9 KB, 16 views)
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Old   May 11, 2021, 10:35
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Can you type the equation, your picture is unreadable.
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"The UDF library you are trying to load (libudf) is not compiled for parallel use on the current platform" is NOT the error after compiling. It is the error after loading. To see compiler errors, look at your screen after you click "build".
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Old   May 11, 2021, 21:12
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WANG LU
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Thank you for your reply.
The equation as follow:
\nabla\cdot\left(\frac{keff}{C_{p}}\nabla\left(f_{v}L\right)\right)
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