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DecomposePar and sets

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Old   January 2, 2007, 21:35
Default I am interested in knowing whe
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Juan Hierro
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I am interested in knowing whether there is any way to work with a mesh divided into different sets (for instance rings around a central cylinder with different transport coefficients) where the final computation of the equations is, moreover, divided into different processors (with divisions along the z axis).

In other words:

Let it be a cylinder with rings around it with different transport properties and each cylinder is modelled by a different set (cellSet is used in the main code to set the transport properties in each ring). Is there any chance to compute the resulting system in parallel?

NOTE: a standard use of decomposePar works fine with everything (faces, nodes, points, patches, ...) except for the definition of the different sets which are not decomposed among the different processors.
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Old   January 3, 2007, 05:52
Default decomposePar does decompose zo
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Mattijs Janssens
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decomposePar does decompose zones (cellZones, faceZones, pointZones). Run setsToZones to convert your sets to zones and use e.g. the 'zoneToCell' cellSet source to convert back.
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Old   January 3, 2007, 09:23
Default Hi Juan! I have written a s
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Bernhard Gschaider
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Hi Juan!

I have written a small modification to decomposePar that decomposes the sets as well. If you're interested, send me a mail.
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Old   January 3, 2007, 16:06
Default Yes, I am interested in that s
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Juan Hierro
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Yes, I am interested in that small modification. I have already sent you a mail.
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Old   January 15, 2008, 07:53
Default Hi Bernhard, This post is
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Frank Bos
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Hi Bernhard,

This post is quite old, but I'm also interested in the modification of decomposePar to decompose cellSets......Could you post it here ?

Thanks and regards, Frank
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Old   January 15, 2008, 14:18
Default Hi Frank! I've adapted it
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Bernhard Gschaider
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Hi Frank!

I've adapted it to compile on 1.4.1 (due to that it won't compile on 1.4 or lower) and put it on the svn on openfoam-extend. You can get it (and a test-case) with this command:

svn checkout https://openfoam-extend.svn.sourcefo...oseParWithSets

As an alternative I'll attach a patch here that contains all the necessary changes to the original decomposePar-sources and should work on 1.3 and 1.4 too.

I havn't used the modification in a long time, but it still seems to work

Bernhard


domainDecomposition.C.patch
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Old   January 15, 2008, 17:05
Default Thanks Bernhard! It seems
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Frank Bos
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Thanks Bernhard!

It seems to work. I now have decomposed a case with two mesh subsets, but something real strange occurs:

The wing motion of the same case with 2 subsets is different in parallel compared to the serial case. Very strange, but at least I can decompose now.....thanks for that.

Frank
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Old   January 25, 2008, 09:48
Default Hi I've tried setsToZone but
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Christofer Ivarsson
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Hi
I've tried setsToZone but then get problems with memory allocation?!

Where do I compile the domainDecompositiion.C.patch file? Does it affect my original decomposePar or can I switch back if it doesnt work? What command to execute the new decomposePar?

RG
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