K-epslion Vs. Realizable K-epsilon. Emergency!!

MOHAMMAD67 · December 2, 2012, 13:02

Dear Foamers
Hi
I have a problem in using K-epsilon model. I'm simulating free surface flow using interFoam. All my models with k-epsilon crashes and make me to use realizable k-e. Fortuately it works well. Now I'm confused what makes it happen?!! Why does k-e become unstable while realiz. works without any problem?

The King · December 2, 2012, 14:14

k -epsilon should work. RNG k-epsilon has an additional term for heavy strained flows, swirling flows and you can use it as a low Reynolds model (no wall functions).

December 2, 2012, 13:02	K-epslion Vs. Realizable K-epsilon. Emergency!!	#1
MOHAMMAD67 Member Mohammad Fereshtehpour Join Date: Jul 2011 Location: Iran Posts: 61 Rep Power: 14	Dear Foamers Hi I have a problem in using K-epsilon model. I'm simulating free surface flow using interFoam. All my models with k-epsilon crashes and make me to use realizable k-e. Fortuately it works well. Now I'm confused what makes it happen?!! Why does k-e become unstable while realiz. works without any problem?

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December 2, 2012, 14:14		#2
The King Member Arnout Join Date: Nov 2010 Posts: 46 Rep Power: 15	k -epsilon should work. RNG k-epsilon has an additional term for heavy strained flows, swirling flows and you can use it as a low Reynolds model (no wall functions).