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-   -   dnesity and phase separation (http://www.cfd-online.com/Forums/cfx/90506-dnesity-phase-separation.html)

JACZ July 12, 2011 13:30

dnesity and phase separation
 
Hi .
I am working with a porous media simulating a drainage of oil in a porous media filled by water. But I found that if I use a low density oil, CFX hold the 2 phases segregated, but when I use an oil with a higer density (near of the water value) after some time ( in transient simulation), the 2 phases are mixed. What is happening? (the gravity is not defined)
Thanks
and sorry by my english

Model :
Laminar
B.C: Vel in, Pressure out
2D
Courant lower than 0.7


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