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Initial OpenFOAM Parallel Performance on Pi Cluster

There has been a few queries on the web about parallel scaling of OpenFOAM on Raspberry Pi’s after a good write up on the Pointwise blog following our first tweet on getting it installed. The graph below shows the scaling for up to four Pi’s on or 3D driven cavity test case. You can see linear scaling only up to 2 Pi’s. Important things to remember here are: OpenFOAM matrix solvers have different parallel performance, and the locations of partition boundaries also affects inter process communications. We’re planning a little project to look at these and other effects of parallel scaling in OpenFOAM. A small cluster of Pi’s is a great (cheap!) way to do this...

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Nov 2016
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