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How to calculate time derivatives in ANSYS Fluent

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Old   July 8, 2020, 14:18
Default How to calculate time derivatives in ANSYS Fluent
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Peter Shi
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Dear Fluent users,

I wonder how can I calculate time derivatives in ANSYS Fluent? For example, I want to compute dp/dt and export it as an independent variable for postprocessing. Is there any way to do it in Fluent?

Thank you very much in advance.

Best regards,
Peter
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Old   July 8, 2020, 16:52
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Normally derivatives are not saved in Fluent. you can always use UDF and save it in UDM and retrieve it later.
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Old   July 8, 2020, 17:00
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Quote:
Originally Posted by rupak504 View Post
Normally derivatives are not saved in Fluent. you can always use UDF and save it in UDM and retrieve it later.
Hello Lolita,

Thank you. Do you happen to have a UDF to save time derivatives that you can share?

Best regards,
Peter
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Old   July 10, 2020, 15:19
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Quote:
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Hello Lolita,

Thank you. Do you happen to have a UDF to save time derivatives that you can share?

Best regards,
Peter
you can always find online, even on this forum, use the search button, and proper keywords.
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