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a discussion on alphaEqn in the solver of interPhaseChangeFoam

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Old   July 10, 2014, 19:07
Default a discussion on alphaEqn in the solver of interPhaseChangeFoam
yijin Mao
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Hi All:

Recently, I have gone through the interPhaseChangeFoam coming with OpenFOAM-2.3.0.

I think the term associated with divU in explicitSolve() is redundant. And My derivation is associated.

99 MULES::explicitSolve
100 (
101 geometricOneField(),
102 alpha1,
103 phi,
104 tphiAlphaCorr(),
105 vDotvmcAlphal,
106 (divU*alpha1 + vDotcAlphal)(), // divU*alpha1 is redundant, right?
107 1,
108 0
109 );
111 tphiAlpha = tphiAlphaCorr;
112 }

Please correct me if I was wrong.
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Old   February 4, 2016, 12:50
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Hi yijin,

Do you find reason of putting alpha1*divU in Su?

Why alpha1*divU there is in explicit source term?

is this source term always positive?

Thank you.
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