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March 2, 2018, 05:53 |
Extreme value of field data
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#1 |
Member
Join Date: Jan 2018
Location: Malaysia
Posts: 58
Rep Power: 8 |
Hi everyone, I ran a simulation using pimpleDyMFoam. The results didnt show very high residuals or bounding error, but the paraview results showed extreme value range of field data (attached picture).
Code:
Courant Number mean: 1.238451 max: 2455.668 Time = 0.5 DICPCG: Solving for cellMotionUy, Initial residual = 5.690536e-09, Final residual = 5.690536e-09, No Iterations 0 PIMPLE: iteration 1 smoothSolver: Solving for p, Initial residual = 0.026853, Final residual = 0.009683854, No Iterations 10 time step continuity errors : sum local = 0.2074094, global = 2.314394e-17, cumulative = 4.727372e-16 smoothSolver: Solving for p, Initial residual = 0.009831345, Final residual = 0.009831345, No Iterations 0 time step continuity errors : sum local = 0.207414, global = -1.020136e-17, cumulative = 4.625358e-16 PIMPLE: iteration 2 smoothSolver: Solving for p, Initial residual = 0.006127573, Final residual = 0.006127573, No Iterations 0 time step continuity errors : sum local = 0.1288116, global = 3.6686e-17, cumulative = 4.992218e-16 smoothSolver: Solving for p, Initial residual = 0.006127573, Final residual = 0.001194937, No Iterations 50 time step continuity errors : sum local = 0.02511953, global = 1.954653e-17, cumulative = 5.187684e-16 smoothSolver: Solving for epsilon, Initial residual = 0.06578633, Final residual = 1.678348e-07, No Iterations 1 smoothSolver: Solving for k, Initial residual = 0.04470441, Final residual = 8.983061e-07, No Iterations 1 ExecutionTime = 1409.42 s ClockTime = 1425 s End U [-2874.39, 2110.38] [0, 24218.3] [-2830.58, 2221.76] p [-1.25611e+8, 5.76314e+7] Capture.jpg Based on my opinion, the U should have max of 20 m/s since my movingWall is moving at 20 m/s in ambient air, is it correct? Please correct me if I am wrong. I am a very newbie in this field. Attached is the link to my case directory. This shows the settings I use. https://www.dropbox.com/s/w1ji9xvdd3...Surf1.zip?dl=0 May I get some suggestion and advice on what setting i had done wrong or how to fix this? I would be grateful for your help. Thanks a lot for your time and help. |
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