[lakeat]

Hi foamers,

I feel mad about my extremely slow parallel computing efficiency.
They are unsteady 3D LES case. incompressible external flow.

When the grid number is around 2M, it works fine, I use 24 or 48 cpus and looks not bad, but when the grid number is around 9M, I try to use 128 cpu or 96 cpu, but the simulation just did not move for a quite long time, (more than a week).

so dear all, what's your idea, and what is your suggestion and your experience.

Any ideas and advice would be highly appreciated!