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piso algorithm in phaseChange phonomena

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Old   November 18, 2010, 09:58
Default piso algorithm in phaseChange phonomena
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Nima Samkhaniani
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hi dear foamer
for incompressible flow there is no state equation for pressure
so for updating pressure we should derive equation from continuity and momentum equation. so in piso algorithm as ∇ u = 0 use the following equation :

fvScalarMatrix pEqn ( fvm::laplacian(rUA, p) == fvc::div(phi) );

however in phase change phenomena ∇ u = 0 is just globally true but in local ∇ u = source term

so should i change the pressure equation or not ?
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phase change, piso, pressure field

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