Meshing Stops after reducing the cell size

mazhar16823 · June 20, 2020, 16:58

Hi everyone,

I am using the SST Transition Model in Starccm+. It is recommended to have mesh on the turbine blade 0.5% of the lowest chord which in my case should be 0.00035 m. For now I am using the custom control for the blade and the cell size is 0.03 m and already 11 M cells, if I further reduce it, it gives a red warning and meshing stops. I am using the PC with two cores and 15 GB RAM. Any idea?

Thanks for your time.

flotus1 · June 20, 2020, 17:19

My first guess would be that your PC is running out of memory with this many cells. 15GB is not a whole lot for more than 11 million cells.
No idea what a "red warning" might be. Maybe check top or taskmanager to see what is going on with memory consumption when the error occurs.

mazhar16823 · June 20, 2020, 17:49

Quote:

Originally Posted by flotus1

My first guess would be that your PC is running out of memory with this many cells. 15GB is not a whole lot for more than 11 million cells.
No idea what a "red warning" might be. Maybe check top or taskmanager to see what is going on with memory consumption when the error occurs.

Sorry the RAM is 15.9 GB however I noticed that it is fully utililizing the RAM around 15.3/15.9 GB.

flotus1 · June 20, 2020, 18:49

Then that's probably your problem. You would need more RAM. And solving such a large mesh on a dual-core CPU is going to take a while.

mazhar16823 · June 20, 2020, 18:53

Quote:

Originally Posted by flotus1

Then that's probably your problem. You would need more RAM. And solving such a large mesh on a dual-core CPU is going to take a while.

Yes exactly. I have tried reducing the cell count by adding curve control, and custom control but they didn't help much.

June 20, 2020, 16:58	Meshing Stops after reducing the cell size	#1
mazhar16823 Senior Member MA Join Date: Mar 2020 Posts: 163 Rep Power: 6	Hi everyone, I am using the SST Transition Model in Starccm+. It is recommended to have mesh on the turbine blade 0.5% of the lowest chord which in my case should be 0.00035 m. For now I am using the custom control for the blade and the cell size is 0.03 m and already 11 M cells, if I further reduce it, it gives a red warning and meshing stops. I am using the PC with two cores and 15 GB RAM. Any idea? Thanks for your time.

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June 20, 2020, 17:19		#2
flotus1 Super Moderator Alex Join Date: Jun 2012 Location: Germany Posts: 3,427 Rep Power: 49	My first guess would be that your PC is running out of memory with this many cells. 15GB is not a whole lot for more than 11 million cells. No idea what a "red warning" might be. Maybe check top or taskmanager to see what is going on with memory consumption when the error occurs.

June 20, 2020, 18:49		#4
flotus1 Super Moderator Alex Join Date: Jun 2012 Location: Germany Posts: 3,427 Rep Power: 49	Then that's probably your problem. You would need more RAM. And solving such a large mesh on a dual-core CPU is going to take a while.