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Creating large meshes (>10,000,00) in parallel

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Old   April 16, 2012, 13:01
Post Creating large meshes (>10,000,00) in parallel
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Fellow members and users of OpenFOAM,

I am having problems creating large meshes (greater than 10,000,000) elements. No surprise I am running out of memory on a single computer. I am looking to create a mesh up to 100,000,000 elements. The domain is simply a unit 1x1x1 cube. Does anyone have a tested procedure for parallel discretization or refinement?

Thanks in advance!
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Old   April 16, 2012, 14:26
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How can your domain be a 1x1x1 cube?
Have you tried with decomposePar and then running sHM in parallel with mpirun?
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Old   April 16, 2012, 15:04
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1x1x1 cube: I am doing a scaling analysis on a cluster to understand how many processors to run different problem sizes. My base case is the incompressible/icoFOAM/cavity tutorial.

The problem I will eventually be solving is airflow within a large building. After the scaling analysis do I...

1. Create a STL file of the domain
2. Use blockMesh for a basic overlapped representation.
3. Use decomposePar to decompose the initial mesh to the number of processors I plan on running the simulation
4. Use snappyHexMesh in parallel to create the actual domain discretization.

Thanks for the quick reply.
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Old   April 16, 2012, 15:29
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Sorry, I'm missing the point then… The question is…?
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Old   April 16, 2012, 16:14
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Quick answer: see the tutorial "./incompressible/simpleFoam/turbineSiting"
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