Boussinesq Approximation on twoLiquidMixingFoam

kit607 · April 16, 2018, 11:36

Greeting everyone,

I'm currently conduct study using twoLiquidMixingFoam to study mixing of liquid. Unfortunately, the solver is non-boussinesq aprroximation. Is there anyone implement boussinesq approx successfully into twoLiquidMixingFoam solver?

I tried modify UEqn file by removing rho term in the equation and multiply with a constantRho, the solver works but the result is incorrect compare to journal study.

Thank You.

piu58 · April 16, 2018, 16:16

You may set the thermophysical properties in a way that is practical identical to the Boussinesq approximation. I did it not for the solver you mentioned, but compared buoyancyBoussinesqPimpleFoam with buoyancyPimpleFoam. They were nearly identical.

April 16, 2018, 11:36	Boussinesq Approximation on twoLiquidMixingFoam	#1
kit607 New Member Fantastic Boy Join Date: Oct 2017 Posts: 13 Rep Power: 10	Greeting everyone, I'm currently conduct study using twoLiquidMixingFoam to study mixing of liquid. Unfortunately, the solver is non-boussinesq aprroximation. Is there anyone implement boussinesq approx successfully into twoLiquidMixingFoam solver? I tried modify UEqn file by removing rho term in the equation and multiply with a constantRho, the solver works but the result is incorrect compare to journal study. Thank You.

April 16, 2018, 16:16		#2
piu58 Senior Member Uwe Pilz Join Date: Feb 2017 Location: Leipzig, Germany Posts: 744 Rep Power: 16	You may set the thermophysical properties in a way that is practical identical to the Boussinesq approximation. I did it not for the solver you mentioned, but compared buoyancyBoussinesqPimpleFoam with buoyancyPimpleFoam. They were nearly identical. __________________ Uwe Pilz -- Die der Hauptbewegung überlagerte Schwankungsbewegung ist in ihren Einzelheiten so hoffnungslos kompliziert, daß ihre theoretische Berechnung aussichtslos erscheint. (Hermann Schlichting, 1950)

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