Implicit solver for gamma volumefraction equation -- CFD Online Discussion Forums

June 20, 2007, 11:19	Cuurently, the volume-fraction	#1
sek Member Sung-Eun Kim Join Date: Mar 2009 Posts: 76 Rep Power: 17	Cuurently, the volume-fraction equation in interFoam, for instance, uses an explicit solver. I was curious whether using an implicit solver would allow me to use larger time-step size. So, I tried to call MULES::implicitSolve01 instead of MULE::explicitSolve1 in gammaEqn.H. It seems to work. One thing I'm not sure about is one of the argument Dpsi of dimensionedScalar type. Looking at the MULE implementation, Dpsi of appears to be a diffusivity introduced as a stabulity measure for gamma equation. I set it to a small value, which seems to work. Can someone comment on whether I'm doing things right, please?

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