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› Forums › OpenLB › General Topics › Parallelization and output › Reply To: Parallelization and output

July 27, 2023 at 11:56 pm #7684
mathias
Keymaster

Dear Alex,

your simulation has diverged. I see that form the line
[LatticeStatistics] step=306000; t=10.2; uMax=0.01; avEnergy=-nan; avRho=-nan
with the “nan”.

You should checkout the last data output and look for a possible cause of the instablity. It may originate from a boundary or the bulk. If the source is the bulk, refine your mesh or increase the smago constant and if the source is the boundary extending the inflow or outflow region or intruducing a fringes might be an option.

Best
Mathias