[jiahui_93]

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).

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

Eg, at t= 0.16
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.