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Problem diverging at different time instants when using hy2Foam with different procs

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Old   January 10, 2019, 02:40
Default Problem diverging at different time instants when using hy2Foam with different procs
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Hi,

I am trying to solve a hypersonic flow past a flat plate problem using hy2Foam, a variant of OpenFOAM meant for hypersonic flow.

I'm using the 11 species model and I realise that when I run with 4 and 8 procs, it diverges at around 1e-4 and 5.2e-5 respectively.

May I know why this is so? Is this due to the linear solver?

How should I troubleshoot?

I'm trying to run with 2 procs and see how it goes...
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Old   January 14, 2019, 22:38
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Hi, I managed to solve the problem myself by using a different linear solver. Changing from PBiCG to PBiCGStab when solving the Yi variables did the trick!
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