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-   -   Abnormal gradient at the inlet (http://www.cfd-online.com/Forums/main/93767-abnormal-gradient-inlet.html)

lalupp October 26, 2011 06:47

Abnormal gradient at the inlet
 
1 Attachment(s)
My cfd code produced abnormal gradient in the solution, see attached PARAVIEW plot.

My problem is flow past a cube incomressible)
2nd order upwind disctisation (shown in fluent literature)
green gauss gradinet,Turbulence SST-k-w

Mesh : Tet
Boundary conditions are no-slip , velocity inlet , outlet


I tried various gradient limiting schemes like MINMOD,SUPERBEE,etc


is it becouse of problem in grdient estimation or something else
Surprisingly my ist oder upwing scheme is free from this problem.
I tried NVD/TVD schemes

All predicting the drag forces correctly but solution is not smooth
problem area is inlet.


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