DNS two-phase flow

idrama · August 10, 2010, 05:51

Hello Foamers,

might anybody tell me how I can run two-phase DNS simualtion in OpenFOAM! What I have to do?

Cheers

kumar · August 11, 2010, 03:07

I think to run a DNS two phase flow you have to use interFoam as used in the dambreak case. But make sure of the schemes you select in the fvSchemes, they should be appropriate for a DNS simulation (second order).

idrama · August 11, 2010, 03:17

Shall I apply every Gauss linear, make the mesh as small as possible and, moreover, turn LES or RANS off?

kumar · August 11, 2010, 04:28

Hi
i think Gauss linear is ok but for making the mesh follow some criteria like the theory of univeral equilibrium by kolmogrov explained in Batchelor book and also in the paper
"Direct numerical simulation and analysis of instability enhancing parameters in liquid sheets at moderate Reynolds numbers" Physics of Fluids 20, 053301 (2008).

Also search on the forum for the settings, may be somebody has posted some information for the choice of the schemes. I cannot really tell you because I am working on LES of two phase flows. I have not really tried any DNS for two phase flows, but I am also looking into the possibilities.

regards
K.Suresh kumar

August 10, 2010, 05:51	DNS two-phase flow	#1
idrama Senior Member Claus Meister Join Date: Aug 2009 Location: Wiesbaden, Germany Posts: 241 Rep Power: 17	Hello Foamers, might anybody tell me how I can run two-phase DNS simualtion in OpenFOAM! What I have to do? Cheers

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August 11, 2010, 03:07		#2
kumar Senior Member Suresh kumar Kannan Join Date: Mar 2009 Location: Luxembourg, Luxembourg, Luxembourg Posts: 129 Rep Power: 17	I think to run a DNS two phase flow you have to use interFoam as used in the dambreak case. But make sure of the schemes you select in the fvSchemes, they should be appropriate for a DNS simulation (second order).

August 11, 2010, 03:17		#3
idrama Senior Member Claus Meister Join Date: Aug 2009 Location: Wiesbaden, Germany Posts: 241 Rep Power: 17	Shall I apply every Gauss linear, make the mesh as small as possible and, moreover, turn LES or RANS off?

August 11, 2010, 04:28		#4
kumar Senior Member Suresh kumar Kannan Join Date: Mar 2009 Location: Luxembourg, Luxembourg, Luxembourg Posts: 129 Rep Power: 17	Hi i think Gauss linear is ok but for making the mesh follow some criteria like the theory of univeral equilibrium by kolmogrov explained in Batchelor book and also in the paper "Direct numerical simulation and analysis of instability enhancing parameters in liquid sheets at moderate Reynolds numbers" Physics of Fluids 20, 053301 (2008). Also search on the forum for the settings, may be somebody has posted some information for the choice of the schemes. I cannot really tell you because I am working on LES of two phase flows. I have not really tried any DNS for two phase flows, but I am also looking into the possibilities. regards K.Suresh kumar