August 14, 2019 at 2:51 pmtrippleDSubscriber
August 14, 2019 at 2:52 pmDrAmineAnsys Employee
Try to interpolate from the obtained results of first coarse mesh.
August 15, 2019 at 6:24 amtrippleDSubscriber
I have tried it, but I still got the same error and I don't know why
August 15, 2019 at 9:15 amDrAmineAnsys Employee
Check if the mesh is valid at first.
August 16, 2019 at 7:21 amtrippleDSubscriber
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
- Orthogonal Quality:
August 16, 2019 at 8:59 amDrAmineAnsys Employee
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?
August 16, 2019 at 9:20 amtrippleDSubscriber
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.
August 16, 2019 at 9:45 amDrAmineAnsys Employee
Settings are okay. Can you set the time scale to 0.01/Angular Speed and try again
August 26, 2019 at 11:38 amtrippleDSubscriber
Do you have an explanation in your words, what the option pseudo transient does?
August 27, 2019 at 2:44 pmDrAmineAnsys Employee
Adding an implicit under relaxation to the discretized equations which might enhance diagonal dominance.
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