Error: divergence detected after mesh refinement
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- Last Post 27 August 2019
- Topic Is Solved
Try to interpolate from the obtained results of first coarse mesh.
I have tried it, but I still got the same error and I don't know why
I checked all the statistic values in Meshing. In my opionion, the statistic looks good. I'm just wondering why the statistic in Workbench Meshing (Aspect Ratio) is different to the check in fluent.
- Orthogonal Quality:
- Min: 0,99982
- Max: 1
- Average: 0,99999
- Aspect Ratio:
- Min: 1,3871
- Max: 2,146
- Average: 1,5421
- Element Quality
- Min: 0,76243
- Max: 0,94858
- Average: 0,90365
- Jacobian Ratio
- Min: 1,0205
- Max: 1,0463
- Average: 1,0299
- Warping Factor
- Min: 6,4811e-015
- Max: 8,9758e-003
- Average: 8,3415e-006
- Parallel Devision
- Min: 1,193
- Max: 1,238
- Average: 1,2
- Maximum Corner Angle
- Min: 90,597
- Max: 91,441
- Average: 90,601
- Min: 6,284e-003
- Max: 1,6159e-002
- Average: 6,6797e-003
I also check the mesh in fluent and report the quality. Nothing out of the ordinary. There is no error:
- Minimum Orthogonal Quality = 9.99824e-01
(Orthogonal Quality ranges from 0 to 1, where values close to 0 correspond to low quality.)
- Maximum Ortho Skew = 1.76141e-04
(Ortho Skew ranges from 0 to 1, where values close to 1 correspond to low quality.)
- Maximum Aspect Ratio = 2.83212e+00
x-coordinate: min (m) = -5.700000e-02, max (m) = 5.700000e-02
y-coordinate: min (m) = -5.700000e-02, max (m) = 5.700000e-02
z-coordinate: min (m) = 0.000000e+00, max (m) = 5.000000e-01
minimum volume (m3): 5.012315e-10
maximum volume (m3): 1.120107e-09
total volume (m3): 4.121465e-03
Face area statistics:
minimum face area (m2): 4.288502e-07
maximum face area (m2): 1.359810e-06
Slightly Different algorithm and allocation of neighborhood(but the theoretical formulation of the metrics are almost the same). Stick to the ones from Fluent.
Quality seems to be okay. You are using coupled solver with pseudo-transient? Can you please add more details?
It is a steady state simulation with pressure-based, coupled solver with pseudo transient.
At Soution Methods: I'm using First Order Upwind for all except for pressure. There i"m using PRESTO!
The outher settings are default. If you need more information, please tell me.
Thank you very much for the good help
Settings are okay. Can you set the time scale to 0.01/Angular Speed and try again
Do you have an explanation in your words, what the option pseudo transient does?
Adding an implicit under relaxation to the discretized equations which might enhance diagonal dominance.
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