Simulation of condensation/evaporation using VOF model in Fluent4.5
 

Did anyone tried to use Fluent 4.5 to simulate condensation/evaporation problem? It is stated in the manual that source term in both VOF equation and pressure correction equation are needed. The source term in VOF equation is straightforward. However, I do not understand why there should be a source term in pressure correction equation. The fluid just changed from one phase to another, the total mass is not changed in the process. Please post your experience!

Thank you very much!!!