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Memory requirements for serial and parallel runs

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Old   August 26, 2008, 15:11
Default Hi OpenFOAM-Community, I have
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Fabian Denner
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Hi OpenFOAM-Community,
I have a question concerning the memory requirements of simpleFoam.

I tried to run a simpleFoam simulation with a mesh of about 4 million cells on a multicore-cpu computer with 8GB RAM. The serial-run breaks down when starting the 1st iteration. But if I take the same case, decompose into two parts and run in parallel with 2 nodes on the same computer (8GB RAM), there is no more memory problem.

Is there any special reason for that kind of memory reequirement?

Best regards,
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