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hmasenger May 8, 2013 12:58

paralle meshing
hi dear frinds

does anyone know how is it possible to run ansys meshing program using 4 prossesors in parallel?
i havealready set the number of processores in tools>meshing>number of cpu=4
but i dont see any diffrence in cpu usage in windows taskmanager

best regards

oj.bulmer May 8, 2013 14:06

I have read somewhere that multicore meshing is effective only for very large meshes. WHat is your mesh size?


hmasenger May 8, 2013 16:13

more than 1 milion

ghorrocks May 8, 2013 22:43

ICEM can use multiple processors, but only for some parts of the meshing process. But it does help. CFX-Mesh can also do multiple processor but it does it by partitioning the geometry I think and that is a bit harder to set up.

Only a few of the meshing tasks are multi-processor enabled. Most of them still occur single processor.

In my experience multi processing in meshing achieves little. Better to get a big machine with enough memory for the entire thing and get let it chug away. It will gt there in the end.

A 1 million node mesh is not that big. This should run fine without special multi-processor operation.

hmasenger May 9, 2013 00:22

4 Attachment(s)
by the way do you know how can i define a refinement for some selective elements in domain? Whatever i decrease the sizing element in a surface, there is always some low quality elements with skewness around 1 in it.I donít know how can i refine this bad elements in the domain as I canít select them ? Also as i set a face sizing future with sphere of influence it makes lots of elements which i donít need and also still doesnít change the maximum skewness factor. I think there is a lake of something like a selection tool in ansys meshing in all versions of this software since ansys workbench 9 !. I donít know why they donít do anything about this . can u help me by this? I need a clue

regards in advance

ghorrocks May 9, 2013 06:23

I would try the ANSYS geometry and meshing forum.

hmasenger May 9, 2013 06:34

i have already tried that ;).it seams that cfx forum is more active and people here are more exprienced.but tanks for the advice.

ghorrocks May 9, 2013 06:40

I see - but I cannot help you much I fear. All I can recommend is to get familiar with all the meshing options and try them all out. There is no substitute for experience.

And lastly - do not be afraid to subtly modify your geometry to make it easier to mesh. Removing a small misalignment which does not affect the flow and replacing it with a simpler face can make all the difference.

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