The calculation efficiency of OpenFOAM -- CFD Online Discussion Forums

September 10, 2009, 21:14	The calculation efficiency of OpenFOAM	#1
chiven Senior Member J. Cai Join Date: Apr 2009 Posts: 180 Rep Power: 17	As we know, OpenFOAM is an amazing CFD software. However, these time, I meet the problem about how to improve the calculation efficiency. I use OpenFoam to solve multi-phase flow. In my case, there are about a million mesh volumes. The time step is 0.00028s to ensure the maximum Courant number of 0.2. Parallel calculation with 64 processors is performed. However, 18 Execution Hours can only finish 1.15s time. About 20s are necessary for my case, this means about 300 Execution Hours will be needed for a case. This is a terrible number. Has anybody used OpenFOAM to finish the large calculation? Let's discuss how to improve the calculation efficiency. Best regards, Chiven

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