# mixing two liquid

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 December 16, 2013, 02:06 mixing two liquid #1 New Member   mostafa Join Date: Dec 2013 Posts: 9 Rep Power: 2 hi my friends i try to modelling the static mixer in fluent that mixed two liquids with the different density, the problem is 3D. how do i do it? what do i use the model viscous? k- epsilon or k-omega or reynolds stress or detached eddy simulation?? what do i use the model viscous? VOF or mixture or aulerian?

 December 16, 2013, 13:03 #2 Senior Member   Join Date: Jan 2010 Location: Germany Posts: 268 Rep Power: 7 -If your fluids are continuous and are interpenetrating each other and could separate then use the full eulerian approach. If they tends to separate then VOF> Please reply upon this or whether one fluid is injected as dispersed particles into the existing fluid. -I assume that your flow is turbulent you can start using the k-epsilon model with enhanced wall treatment (as first instance) -Enable gravity and give the density of your lightest phase as the reference one -Start first of all doing some tutorials in multiphase and turbulence

December 16, 2013, 15:09
#3
New Member

mostafa
Join Date: Dec 2013
Posts: 9
Rep Power: 2
Quote:
 Originally Posted by Zaktatir -If your fluids are continuous and are interpenetrating each other and could separate then use the full eulerian approach. If they tends to separate then VOF> Please reply upon this or whether one fluid is injected as dispersed particles into the existing fluid. -I assume that your flow is turbulent you can start using the k-epsilon model with enhanced wall treatment (as first instance) -Enable gravity and give the density of your lightest phase as the reference one -Start first of all doing some tutorials in multiphase and turbulence
thanks for your helping my friends
you mean i should use the aulerian method?
one of the liquids is water and the other liquids is the condensate product with 735 kg/m^3 density. in this static mixer i try to full mixing within liquids. the water with 3.75 kg/s and the condensate product with 20 kg/s enter the mixer that is the pipe with internal blade for mixing and the mixer size is 1500mm. the problem is 3d and i have problem with mesh this.