[ICEM] ICEM CFD mesh generation is slow

okgydud · December 14, 2025, 10:36

Hi guys

I am trying to understand why ICEM CFD is performing slowly.
My workstation is equipped with an Intel Xeon Silver 4210 CPU.
Generating a mesh takes more than 1 to 2 hours, and sometimes the process even crashes.

Gert-Jan · December 15, 2025, 16:32

- It depends on the meshing method you use. Can you elaborate?
- It depends on your geometry. If the geometry is sloppy, then ICEM has a lot of holes to repair. This takes long. The solution is to provide a smooth geometry.
- It also depends on how many elements you have. The more, the longer it takes...
- Did you create Body points. It you don't, then ICEM doesn't understand your geometry.
- Are you sure you havve turned on "Parallel meshing".

okgydud · December 16, 2025, 23:10

Thanks for your answer.
I was using only tetra mesh generation.
I also realized that I had been running it in single-core mode.
After switching to parallel processing, the meshing speed improved significantly.

December 14, 2025, 10:36	ICEM CFD mesh generation is slow	#1
okgydud New Member Kim Hyo Young Join Date: Dec 2025 Posts: 2 Rep Power: 0	Hi guys I am trying to understand why ICEM CFD is performing slowly. My workstation is equipped with an Intel Xeon Silver 4210 CPU. Generating a mesh takes more than 1 to 2 hours, and sometimes the process even crashes.

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December 15, 2025, 16:32		#2
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,996 Rep Power: 29	- It depends on the meshing method you use. Can you elaborate? - It depends on your geometry. If the geometry is sloppy, then ICEM has a lot of holes to repair. This takes long. The solution is to provide a smooth geometry. - It also depends on how many elements you have. The more, the longer it takes... - Did you create Body points. It you don't, then ICEM doesn't understand your geometry. - Are you sure you havve turned on "Parallel meshing".

December 16, 2025, 23:10		#3
okgydud New Member Kim Hyo Young Join Date: Dec 2025 Posts: 2 Rep Power: 0	Thanks for your answer. I was using only tetra mesh generation. I also realized that I had been running it in single-core mode. After switching to parallel processing, the meshing speed improved significantly.