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Error in compressible flow

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Old   December 27, 2007, 00:19
Default Error in compressible flow
  #1
krish
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Hi all,

I am doing compressible flow(air) analysis.

Inlet boundary condition = velocity = 39 m/s( constant mass flux) Outlet pressure boundary = 1 bar.

After some time i am getting this error

*** WARNING #060 *** DENSITY OUT OF BOUND DUE TO PRESSURE CORRECTION AT CELL 1 DENSITY= -1.8867E+00 LIMITER APPLIED

Finally it says

"Negative densities found at more than 100 cells" RUN STOPPED.

Please give me some suggestions to sort this problem.

Regards Krish
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Old   December 27, 2007, 09:43
Default Re: Error in compressible flow
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Balduin Bankerotti
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1) search in the forum for "Negative densities found at more than 100 cells"

2) reduce the unterrelaxation for density
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