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FLUENT 19.2 User Defined Real Gas Model udf problem

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Old   June 22, 2019, 16:40
Default FLUENT 19.2 User Defined Real Gas Model udf problem
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mohammad karimi pour
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Hello
I've copied the exact same udf of UDRGM of ANSYS HELP 19.2 Ch.7, which is simply EOS for ideal-gas, to a ".c" file, then compiled it.
First, I got:
** WARNING: Automatically switched to run in parallel -t1 mode. **
** Detected non-parallelized UDF usage, enabling parallel usage. **
** If you encounter any issues, please re-run with -t0 flag. **
which vanished when I started fluent->parallel with 0 processors.

Anyway, when the material is air with ideal gas setting of database everything is OK, but when I use the UDRGM this error emerges:

iter continuity x-velocity y-velocity energy time/iter
Stabilizing x-momentum to enhance linear solver robustness.

Error: Divergence detected in AMG solver: x-momentum

Error: Divergence detected in AMG solver: x-momentum
Error Object: #f

Is it a problem of version of Fluent or it has something to do with serial/parallel udf?
https://www.sharcnet.ca/Software/Ans...gas_udrgm.html
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Old   June 23, 2019, 21:39
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Alexander
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Quote:
** If you encounter any issues, please re-run with -t0 flag. **
which vanished when I started fluent->parallel with 0 processors.
best regards
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