Something wrong in UEqns.H within twoPhaseEulerFoam
I'm right now trying to understand how twoPhaseEulerFoam works, and get what they are erally solving. However, There seems something odd in the code.
Following is the source code for Ua and Ub in twoPhaseEulerFoam: Quote:
Or does openfoam has assigned use Ua to calculate dispersed phase and Ub for continuous phase? for example I define b as dispersed phase, then openfoam will solve Ua for b? Also, note that only in Ueqn for a we can find the kinetic theory option. Is that true? What's the momentum equation to guide this code? I'm relatively new to twoPhaseEulerFoam. Any help will be highly appreciated! |
Hi Charlie,
I am using kinetic theory in twoPhaseEulerFoam but my solution diverges. Maybe it could be because of that you showed up. Have you achieved a conclusion about that? Thanks |
Try to reduce the timestep
Hi,
There are two options to simulate the particle phase turbulence (In the code). If we turn on the kinetic theory, then use kinetic theory to calculate the effective viscosity of particle phase. If we turn the kinetic theory off, then we use turbulent response coefficient Ct to model the turbulent viscosity of particle phase. As far as I'm concerned, the alphaEqn is more of significance leading to numerical divergence, since the alphaEqn in twoPhaseEulerFoam is nonlinear and also need to be bounded on both ends. try to refer to PhD thesis of Henrik Rusche, 2002. About the phase selection, I just confirm to the convention, that is, use default setting, a as disperse phase, b as continuous phase. Any question are welcomed. Charlie Quote:
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