[Bal21]

Hi all,

I have a new question, and appreciate the time that you might put in trying to address it.

I'd an attempt of performing volume meshing in hpc cluster. The original (unmeshed file) was ~200 Megabyte whereas the meshed file was ~32 Gigabyte. Meshing was excuted without issues, however, when I tried to open the geometry or the meshed scenes in the output.sim file, it didn't respond.
Is this issue likely to be related to the poor performance of the computer or something went wrong in hpc? Any suggestions/thoughts are appropriated. A million thanks.

[MFitl]

32GB File size of an mesh? Realy?

Probably you will run out of memory again. And it could be that also your starccm+ client will be at it's end regarding memory.

Your mesh settings are way to fine and you get way to much cells in your domain.

Can you explain what are you simulating and at witch size (meters) your domain is?

[Bal21]

First of all, thanks a lot for your response.

Agreed. The mesh is unrealistically very fine.

However, I thought (and probably I'm wrong, so please correct me) that the finer mesh reduces the errors that I might get due to surface issues and also the errors that I might be facing while solving. I'm solving fluid and energy transfer. The fine mesh helped me also in capturing the fine details of the geometry that I'm meshing.


May I ask you to please elaborate on the "star ccm client's memory" part?

[MFitl]

As always try to keep the mesh size as coarse as possible.
Start with a coarse mesh and refine it afterwards to see if the results are changing.
Start with a coarse base size of the surface and let the mesher refine it to a reasonable amount.
Start with 3-5 layer at the surface, take a look to the resulting Y+ values and remesh accordigly.

Beware refining the mesh by a factor of two make ~8 times more cells!


What is the geometrical size of you domain? What are the finest details of the surface you realy need to take care of?
Could you show a picture of your domain (CAD-Data)?

The more cells/surfaces you have the more data needs to be tranferred from the server process on the HPC to the client proces on your computer. Depending on your computer you might get out of memory with a 32GB File.

[Bal21]

Many thanks..

I increased the mesh size and the file size decresead as a result. So, I can view the scenes now))

The geometry's dimensions are: 100 m*50m*10m.