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July 3, 2018, 13:00 |
buoyantKEpsilon in driftFluxFoam
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#1 |
Senior Member
Reviewer #2
Join Date: Jul 2015
Location: Knoxville, TN
Posts: 141
Rep Power: 11 |
Hi everyone,
Just curious about why the driftFluxFoam tutorial use buoyantKEpsilon as the turbulence model? driftFluxFoam Solver for 2 incompressible fluids using the mixture approach with the drift-flux approximation for relative motion of the phases. buoyantKEpsilon (Compressible RAS turbulence models) Additional buoyancy generation/dissipation term applied to the k and epsilon equations of the standard k-epsilon model. Thanks in advance. |
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July 3, 2018, 14:53 |
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#2 |
Senior Member
Join Date: Aug 2015
Posts: 494
Rep Power: 15 |
It looks like there is still a gravitational term used by the solver (check out createFields, pEqn, etc) suggesting that the liquid components' relative compressibility/density is not taken into account, but background compressibility/density are (and the difference in density between any gas and the two liquids). I am not terribly familiar with the multiphase family of solvers but if buoyancy is of concern having a RAS model tuned for buoyancy modeling makes sense.
Caelan |
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