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Problem with meshing

Posted 28 janv. 2013, 23:18 UTC−5 Fluid & Heat, Heat Transfer & Phase Change, Computational Fluid Dynamics (CFD), Geometry, Mesh, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 4.3a 5 Replies

Nithin
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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??
5 Replies Last Post 29 janv. 2013, 09:22 UTC−5
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 29 janv. 2013, 01:45 UTC−5
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
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
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Posted: 1 decade ago 29 janv. 2013, 03:23 UTC−5

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!
[QUOTE] 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 [/QUOTE] Thank You Ivar... I am currently working with 2GB RAM. I suppose that I can try with 4GB RAM!
Edgar Kaiser
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Posted: 1 decade ago 29 janv. 2013, 07:17 UTC−5

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
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
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Posted: 1 decade ago 29 janv. 2013, 07:29 UTC−5

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??
[QUOTE] 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 [/QUOTE] 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
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Posted: 1 decade ago 29 janv. 2013, 09:22 UTC−5
Yes, that is no problem.
Yes, that is no problem.

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