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-   -   Incompressible, miscible mixing of two fluid stream OpenFOAM (http://www.cfd-online.com/Forums/openfoam-solving/103647-incompressible-miscible-mixing-two-fluid-stream-openfoam.html)

Nishchal June 22, 2012 05:42

Incompressible, miscible mixing of two fluid stream OpenFOAM
 
Hi,

I am very new to openFOAM and this forum. To get feel of OpenFOAM i decided to setup a test case involving mixing of two fluid stream (compressible and miscible).

It is not a two-phase situation i am dealing with, it is one phase (water) at two different temperatures mixing in a T-junction.

Can anyone suggest me which solver to use?

wyldckat June 23, 2012 15:49

Greetings Nishchal,

I'm no expert on this subject, so until someone more experienced responds, here's what I know...

If you check the folder "heatTransfer" in the OpenFOAM "tutorials" folder, you'll find these solver tutorials:
Quote:

Code:

buoyantBoussinesqPimpleFoam
buoyantBoussinesqSimpleFoam
buoyantPimpleFoam
buoyantSimpleFoam
buoyantSimpleRadiationFoam
chtMultiRegionFoam
chtMultiRegionSimpleFoam


"Simple" ones are for stationary simulations; "Pimple" ones are for transient simulations; "chtMultiRegion" ones are for multiple mesh domains with different fluids/solids.

Best regards,
Bruno

inf.vish July 31, 2013 01:18

Hi Nishchal,
Did you find out which solver to use and what boundary conditions to use?
I am also looking at the same problem and have been stuck on it for three days now. I am not able to find this simple example anywhere.

Annier July 31, 2013 09:52

multiphase flow solver would be the option in my guess
 
since the pure substance is having different thermodynamic states before mixing, it may be somehow relevant to treat them as two different fluids? if the compressibility can be ignored, twoLiquidMixingFoam is there as a standard solver in OpenFoam. otherwise, you need to modify this solver by adding the codes related to the compressibility of the fluids. still you can search for other relevant solvers which may best fit your physical model.

inf.vish July 31, 2013 09:54

i used buoyantBoussinesqSimpleFoam. But i will try with twoLiquidMixingFoam also. Thanks :)


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