Extremely Slow Plotting Issue for Sliding Mesh Simulation in FLUENT

[Kin Wing Wong]

Hello,

I have a transient sliding mesh simulation of rotor-stator type, like a stirred tank problem. The simulation runs fine, however, the plotting of the velocity related contour requires very long processing time, like 6-7 hours. I suppose it is doing some interpolation operation to plot the velocity variable in the new grid. The mesh is around 9 million cells. My computer is kind of not slow, 128GB Ram with i9 13900K. So, I wonder if this issue has been faced before? If I can afford waiting 6 to 7 hours, the velocity contour will eventually shown but then it is a painful task if I want to make animation of different timesteps. My version of fluent is 21.0R2. This issue only occurs with sliding mesh. For the preparation of the case, I use the mrf-to-sliding command after a converged MRF run. So, the simulation runs normally, just the postprocessing is too slow in my opinion.

This 6-7 hours waiting time has to only be done once for each update of the sliding mesh...