CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   OpenFOAM Running, Solving & CFD (http://www.cfd-online.com/Forums/openfoam-solving/)
-   -   swirling flow in simpleFoam compared with FLUENT (http://www.cfd-online.com/Forums/openfoam-solving/69710-swirling-flow-simplefoam-compared-fluent.html)

belinda November 2, 2009 04:57

swirling flow in simpleFoam compared with FLUENT
 
Hi all, good morning.
I am using simplefoam(v1.4) to calculate a swirling flow in chamber, the case is download from ERCOFTAC database.
http://cfd.mace.manchester.ac.uk/cgi...html&1&0&0&0&0
It is a 2D case.

But I got some problem.
When I want to compare the results with FLUENT ones, it seems that the result from FOAM have a great "dissipation".
i post the velocity magnitude here, you may find that the high velocity in FLUENT last long.
http://picasaweb.google.com/lh/photo...eat=directlink
http://picasaweb.google.com/lh/photo...eat=directlink

I used realizable k epsilon model for both of them.
The grids are the same, y plus are around 60. (before this case, I run a case which y plus are around 5, the same thing happened.)
Both of them use the same velocity inlet.
the numerical schemes i used default ones, cause i confused by the differences between FOAM and FLUENT.

Please, give me your ideas.
Thanks.


All times are GMT -4. The time now is 00:20.