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Old   March 15, 2005, 08:29
Default negative density
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novice
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Hi All,

My run is coming out by giving -ve density error. The fluid is air with compressible setting on. In the geometry there is 0.9 mm gap through which air is flowing and pressure drop is around 5 bar. Is this the reason for -ve density error. My mesh is tetra and I have kept 3 cells in the 0.9 mm gap. I use MARS scheme.

Kindly guide.

Thanks
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Old   March 15, 2005, 10:27
Default Re: negative density
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Ted Crilly
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you might try using UD scheme when starting from scratch and then move onto MARS discretisation scheme, it may help

-ted
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