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-   -   [ANSYS Meshing] ICEM Memory issue (http://www.cfd-online.com/Forums/ansys-meshing/107671-icem-memory-issue.html)

davidwilcox October 3, 2012 14:42

ICEM Memory issue
 
Hi,
I'm am trying to create a mesh in ANSYS ICEM. it is a 3d mesh consisting of a lot of roughness elements. Since the elements are made up of cubes, i figured the best meshing would be that of a blocking approach. However, my computer freezes every time i tried to mesh it. What would be a rule of thumb here in terms of computer memory. Is 32 GB of RAM enough for high volume meshes? Or 64 GB?
Thanks in advance!

stuart23 October 4, 2012 09:55

David, I commonly work with hexa meshes of 80~100 million elements. When you are doing your blocking, keep all of your refinement down, then do your edge parameters last. I wrote a script that turns the pre-mesh into unstructured mesh then cnverts it to the right output.

On a 24GM RAM machine, this process uses much more than the avalible memory, and takes a few hours to complete. I usually run the script at the end of the day, then come in the next day to a big fat .msh file sitting on my desktop. It is slow, but if done overnight, it does not waste any time.


Stu

Far October 13, 2012 07:47

Quote:

Originally Posted by stuart23 (Post 384932)
David, I commonly work with hexa meshes of 80~100 million elements. When you are doing your blocking, keep all of your refinement down, then do your edge parameters last. I wrote a script that turns the pre-mesh into unstructured mesh then cnverts it to the right output.

On a 24GM RAM machine, this process uses much more than the avalible memory, and takes a few hours to complete. I usually run the script at the end of the day, then come in the next day to a big fat .msh file sitting on my desktop. It is slow, but if done overnight, it does not waste any time.


Stu


Stuart are you working on LES?

stuart23 October 13, 2012 10:31

Nope, just good old RANS


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