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What is the reason for "Divergence detected in AMG solver: x-momentum"?

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Old   November 6, 2018, 03:29
Default What is the reason for "Divergence detected in AMG solver: x-momentum"?
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niewiemnic
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Hallo,


now I have a problem by calculation with FLUENT and if I click Check Case in Run Calculation then there are no recommendations for grid or solution methods but my calculation is always stopped with that problem. I also read that the false initial and boundary conditions can be the reasons, but I think I put all parameters not false... how can I solve this problem?

Mesh Quality:
Minimum Orthogonal Quality = 2.27365e-01
(Orthogonal Quality ranges from 0 to 1, where values close to 0 correspond to low quality.)
Maximum Ortho Skew = 7.72635e-01
(Ortho Skew ranges from 0 to 1, where values close to 1 correspond to low quality.)
Maximum Aspect Ratio = 4.08410e+01

Domain Extents:
x-coordinate: min (m) = 1.697250e-01, max (m) = 1.841900e-01
y-coordinate: min (m) = -2.214984e-02, max (m) = 6.358608e-03
z-coordinate: min (m) = -4.753103e-03, max (m) = 4.753103e-03
Volume statistics:
minimum volume (m3): 5.020087e-16
maximum volume (m3): 1.816189e-11
total volume (m3): 1.149541e-06
Face area statistics:
minimum face area (m2): 2.954245e-11
maximum face area (m2): 1.284175e-07
Checking mesh.........................
Done.


I think there is no significant problem in this message and what would be the reason for the divergence?

Last edited by spalartallmaras; November 7, 2018 at 03:28.
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Old   November 6, 2018, 09:36
Default Divergence Problem
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niewiemnic
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The problem was solved. The reason was from the wrong properties of the fluid. If someone struggles with similar problems, I want to suggest also to use universal fluids like water or air at first!
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