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OpenFOAM - parallel raspberry pi 4 grid/cluster

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Old   November 5, 2019, 09:20
Default OpenFOAM - parallel raspberry pi 4 grid/cluster
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Ivan
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Hello,


I would like to ask you about possibility to use OpenFOAM for parallel calculations with some raspberry pi 4 type computer.
How many raspberry pi 4 is need to have the same calculation power asi for example with Intel I7 with six cores - for example.

Or is there possibility to run OpenFOAM on some Google Coral edquipment ?


Thank you and regards,
Ivan
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Old   November 5, 2019, 09:46
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The first question that comes to mind is: why?

It is definitely possible to build a diy cluster from single-board computers like raspberry pi. There are plenty of examples on the internet, e.g. https://www.researchgate.net/publica...rry_Pi_Cluster and https://blog.mvbakker.nl/posts/openf...raspi-cluster/
But these are not practical in any way. These projects are either for fun, or for learning purposes. If that is what you want, then go ahead
If you want performance per dollar (and much less hassle), get a normal PC instead.
Ultimately, the performance of such a cluster would be limited by the node interconnect. Without low-latency interconnects available, speedup in CFD applications like OpenFOAM will drop off rather quickly. Maximum scaling was observed on only 4 nodes here: https://krex.k-state.edu/dspace/handle/2097/17612
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