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Different results when I use parallel computing

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Old   June 26, 2020, 18:50
Default Different results when I use parallel computing
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Hi,

I am trying to solve a simple combustion problem with Fluent. However, the result of the mass fraction for specific gas when the Solver Processes parameter is 1 is significantly different from the case when I change it to 16. Do you have any idea where this difference is coming from and how I can fix it?

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Old   June 26, 2020, 19:22
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Any convergence or stability issues?
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Old   June 26, 2020, 19:29
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Yes, I understand. It seems I didn't describe the problem very well.
I am just changing the number of the processors to 16, and as a result, the mass fraction at the end of the time step in my goal location is significantly different from the case I have just 1 processor!

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Old   June 26, 2020, 19:31
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No issue at all. It's working very well in both cases. However, the results are different.
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combustion, fluent, parallel calculation, species mixing

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