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Error: Divergence detected in AMG solver: species-0

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Old   April 29, 2024, 06:31
Exclamation Error: Divergence detected in AMG solver: species-0
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Evi Partsalidi
Join Date: Apr 2024
Location: Athens, GR
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iamdesperate is on a distinguished road
Hi i am trying to run a simulation for a pipeline with natural gas that is injected with H2 (vertical pipe).

The simulation runs fine when i am not using udf (so the mesh and setup, initialization etc are okay i guess). As soon as i try to load udfs problems occur.

I have one c file that has the 4 equations i need. The first problem occurs when i press build:

Error: The UDF library you are trying to load (C:\Users\evipa\Desktop\8\Sim_files\dp0\FFF\Fluent \libudf) is not compiled for 3d on the current platform (win64).\n\nThe system cannot find the file specified.
\n\nC:\Users\evipa\Desktop\8\Sim_files\dp0\FFF\Flu ent\C:\Users\evipa\Desktop\8\Sim_files\dp0\FFF\Flu ent\libudf\win64\3d\libudf.dll
Error Object: #f

(I make sure to delete the previous udf in the library before building again)

Despite the message, when i go to manage it shows the udf, so i can load it.

Then i put the udf in the materials i use (at the fluid and mixture folder), and do initialization again (haven't changed anything else from the original simutalion that run without udf).

Then i keep seeing the same 2 errors over and over again:

reversed flow in 5 faces on pressure-outlet 9.
# Divergence detected in AMG solver: species-0 -> Increasing relaxation sweeps!
# You may try the enhanced divergence recovery with (rpsetvar 'amg/protective-enhanced? #t)
--------------------------------------------------------------------------------------
Error: Divergence detected in AMG solver: species-0

Error: Divergence detected in AMG solver: species-0
Error Object: #f




Any idea on what to do? I keep thinking that the problem is because of the compile but idk how to fix it.

Thanks in advance.
Yours truly,
A desperate student
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#ansys, #compile, #fluent, #udf


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