negative density
 

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

Re: negative density
 

you might try using UD scheme when starting from scratch and then move onto MARS discretisation scheme, it may help

-ted