Slow Snapping Phase
 

Hello all,

After a recent hardware change I have noticed a huge slow down in the performance of snappyhexmesh, especially in the snapping phase.
During the morph iterations the time to move the mesh increases significantly compared to the old system. Moreover when I increase the number of course the performance goes down even more.
The old system consist of a i9 12900k with 64Gb of RAM 4 channel and the new system of 5975WX with 128GB of RAM 4 channel.
When both using 16 cores I get the following times:
Meshing: 14min (old) 31min (new)
Solving: 25min(old) 19min (new)
So we see as expected that the new system solved faster but the meshing that is increased massively.
On the new system using the full 32 cores I get 55min for the meshing and 14min for the solving
The case consist of an axial fan solved with simpleFOAM in Openfoam V2312 with a cell count of 1.4 Million.
If anybody has any information regarding this topic I would be glad to hear.


Kind Regards, Bram