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Velocity is not calculated in pimpleDyMFoam

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Old   May 6, 2015, 15:03
Default Velocity is not calculated in pimpleDyMFoam
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Dear All
I'm new in openFoam. At this moment i'm trying to simulate a vertical turbine using AMI and pimpleDyMFoam. I'm running my case successfully but there is something bothering me from the log file which I found there was no solving for any velocity (Ux and Uy) in all iteration. I think the velocity is supposed to be calculated and mentioned in the log file, isn't it?. Does it mean my simulation is not calculating any velocity? How to solve this issue?
Any help will be appreciated. Thank you

Best regards
Arini

Courant Number mean: 0.0579181 max: 574.194
Time = 0.01

solidBodyMotionFunctions::rotatingMotion::transfor mation(): Time = 0.01 transformation: ((0 0 0) (0.999771 (0 0 0.0214144)))
AMI: Creating addressing and weights between 132 source faces and 132 target faces
AMI: Patch source weights min/max/average = 1, 1.00013, 1.00007
AMI: Patch target weights min/max/average = 1, 1.00013, 1.00007
GAMG: Solving for pcorr, Initial residual = 1, Final residual = 0.0151048, No Iterations 18
GAMG: Solving for pcorr, Initial residual = 0.253889, Final residual = 0.0166614, No Iterations 1
time step continuity errors : sum local = 4.28193e-05, global = 1.41048e-07, cumulative = 1.41048e-07
PIMPLE: iteration 1
GAMG: Solving for p, Initial residual = 1, Final residual = 0.00899658, No Iterations 10
GAMG: Solving for p, Initial residual = 0.00165518, Final residual = 1.29099e-05, No Iterations 4
time step continuity errors : sum local = 3.78644e-06, global = 5.77749e-07, cumulative = 7.18797e-07
GAMG: Solving for p, Initial residual = 0.00404807, Final residual = 3.5418e-05, No Iterations 10
GAMG: Solving for p, Initial residual = 0.00116074, Final residual = 9.17459e-06, No Iterations 4
time step continuity errors : sum local = 2.71134e-06, global = 4.23926e-07, cumulative = 1.14272e-06
PIMPLE: iteration 2
GAMG: Solving for p, Initial residual = 0.00337371, Final residual = 2.96174e-05, No Iterations 10
GAMG: Solving for p, Initial residual = 0.000972222, Final residual = 7.79675e-06, No Iterations 4
time step continuity errors : sum local = 2.70749e-06, global = 4.52654e-07, cumulative = 1.59538e-06
GAMG: Solving for p, Initial residual = 0.00143422, Final residual = 1.22148e-05, No Iterations 10
GAMG: Solving for p, Initial residual = 0.000684461, Final residual = 5.56497e-06, No Iterations 4
time step continuity errors : sum local = 1.94238e-06, global = 3.34556e-07, cumulative = 1.92993e-06
PIMPLE: iteration 3
GAMG: Solving for p, Initial residual = 0.000713198, Final residual = 5.91503e-06, No Iterations 9
GAMG: Solving for p, Initial residual = 0.000380654, Final residual = 3.26779e-06, No Iterations 4
time step continuity errors : sum local = 1.13974e-06, global = 1.80353e-07, cumulative = 2.11029e-06
GAMG: Solving for p, Initial residual = 5.22887e-05, Final residual = 4.88379e-07, No Iterations 6
GAMG: Solving for p, Initial residual = 1.85897e-05, Final residual = 9.88278e-08, No Iterations 8
time step continuity errors : sum local = 3.47519e-08, global = 7.51709e-09, cumulative = 2.1178e-06
DILUPBiCG: Solving for omega, Initial residual = 0.0400527, Final residual = 3.26906e-07, No Iterations 231
DILUPBiCG: Solving for k, Initial residual = 1, Final residual = 6.38729e-05, No Iterations 1001
PIMPLE: converged in 3 iterations
ExecutionTime = 10.54 s ClockTime = 11 s
Attached Files
File Type: txt fvSolution.txt (2.6 KB, 8 views)
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Old   June 4, 2015, 00:35
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James Behzadi
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Could you find out why this happens? I am having similar issue. Thanks!
James
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Old   June 4, 2015, 08:01
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Hi James
I still cant figure out what exact problem that cause the issue. I suspect it was because the mesh. What is your case?

Anyone, Is there any clue for us?
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Old   June 4, 2015, 10:09
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Thanks for prompt reply.
I am running reactingFoam under OpenFOAM-2.0.0. May be that's the issue. The results of simulation are fine, but just wondering why the convergence stuff for Ux and Uy don't show up!
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Old   June 4, 2015, 11:21
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Dongyue Li
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Hi James!

When u solve momentum predictor, openfoam will solve Ueqn(). But if not, it will not solve Ueqn(). By default, some cases this is switched off. No wonder there is no iterations about U.

lol
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Old   June 4, 2015, 20:56
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Thanks Dongyue Li.
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