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Fluctuating sum local error

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Old   August 7, 2012, 11:45
Default Fluctuating sum local error
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Kalyan
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Guys,

I am having this problem where the sum local fluctuates between 10-30 for I have no idea why. I am running rhoPorousMRFSimpleFoam and everything seems to be right but sum local does this. Is there a reason why this happens and what exactly does this mean? If I increase the nNonOrthogonalCorrectors, it fluctuates between 0.1 and 2. After some iterations, when I check the solution, it gives pure rubbish results (negative pressure !!!) . I am quite sure all the initial and boundary conditions are right ( I have a fluent case for same numbers which gave me expected results)

Checkmesh doesnt report any errors. I tried fiddling with the relaxation settings and that doesn't help much. Also, I am running a first order upwind scheme.

Can someone tell me what all of this can mean?

Thanks,
Kalyan
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Old   August 9, 2012, 14:05
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Kalyan
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The error has been resolved ..

Even though checkMesh hasn't given me any errors, looks like the mesh is not the best in the world. I had to use 10 nonOrthogonalCorrectors to get it to run and give me correct results.

Kalyan
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sum local, time step continuity

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