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P diverging pointwise

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Old   June 5, 2023, 12:10
Exclamation P diverging pointwise
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Silvia Sambuca
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Hi everybody, I am trying to simulate an industrial symmetryc air duct with incompressible steady state algorithm (SIMPLE). The mesh is very fine and it's tethraedrical (1 mm max size and 0.5 mm for min size for a 8 meters duct). At some point of the simulation some cells near the inlet diverge by increasing too much the pressure for no reason. (see attached pics)

Did anybody have the same problem? If you need I can also send Bcs, fvschemes and fvsolution files.

I also attached an image of the internal part of the duct (quite complex with support beams).
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Old   June 5, 2023, 12:32
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Domenico Lahaye
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Reduce relaxation factor in system/fvSolution ?
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Old   June 6, 2023, 03:48
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Silvia Sambuca
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Quote:
Originally Posted by dlahaye View Post
Reduce relaxation factor in system/fvSolution ?
right now the relaxation is 0.2 for p and the turbulent parameters and 0.3 for U . Isn't it enough?
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