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Problem with meshing

 Topics: 4.3a, CFD, Fluid Flow, Heat Transfer, Physics, Mesh, Geometry
RSS feed   |   Turn on email notifications   |   5 Replies   Last post: January 29, 2013 2:22pm UTC

Nithin

January 29, 2013 4:18am UTC

Problem with meshing

Sir,

While meshing my model, I am getting an error message as follows "Out of memory for mesh processing". What does that error mean and what are the correction requirements??

Ivar Kjelberg

January 29, 2013 6:45am UTC in response to Nithin

Re: Problem with meshing

Hi

basically either get more RAM, or reduce the mesh density: use symmetry (model 1/2 or 1/4 ... if possible), use 2D instead of 3D. Even if simplifications by symmetry is not always possible, often one can simplify the geometry, but this require some "engineering" insight in the solution to decide what is or not relevant.
with my 48GB of RAM I can solve problems of 2-4 MDoF but there are many DoF per element, all depends on the physics and discretisation being used

--
Good luck
Ivar

Nithin

January 29, 2013 8:23am UTC in response to Ivar Kjelberg

Re: Problem with meshing

Hi

basically either get more RAM, or reduce the mesh density: use symmetry (model 1/2 or 1/4 ... if possible), use 2D instead of 3D. Even if simplifications by symmetry is not always possible, often one can simplify the geometry, but this require some "engineering" insight in the solution to decide what is or not relevant.
with my 48GB of RAM I can solve problems of 2-4 MDoF but there are many DoF per element, all depends on the physics and discretisation being used

--
Good luck
Ivar

Thank You Ivar...

I am currently working with 2GB RAM. I suppose that I can try with 4GB RAM!

Edgar Kaiser

January 29, 2013 12:17pm UTC in response to Nithin

Re: Problem with meshing

If you are using a 32 bit Windows system a single process cannot use more than 2 GB RAM. You can set the /3GB switch in win.ini I think. But 3GB is then the limit. I tried that once and it made my PC instable.
If you want to use more RAM you must switch to a 64 bit system.

Cheers
Edgar

Nithin

January 29, 2013 12:29pm UTC in response to Edgar Kaiser

Re: Problem with meshing

If you are using a 32 bit Windows system a single process cannot use more than 2 GB RAM. You can set the /3GB switch in win.ini I think. But 3GB is then the limit. I tried that once and it made my PC instable.
If you want to use more RAM you must switch to a 64 bit system.

Cheers
Edgar

Thanks Edgar...

Is it possible to open a file (made in COMSOL 4.3a installation compatible with 32 bit) on 62 bit installation??

Edgar Kaiser

January 29, 2013 2:22pm UTC in response to Nithin

Re: Problem with meshing

Yes, that is no problem.

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