[applekiller]

Hello everyone!

I have recently been calculating the example of multiphase flow (although it is my own solver, but many parts refer to MPPICInterFoam), and calculated that at one point there is negative pressure at the gas-liquid interface (using absolute pressure), through the output data, It is probably guessed that the velocity field of a mesh cell is too large (this may be caused by the value of alpha.water field in that mesh cell is too small), resulting in the pressure calculated later is too large, and thus negative pressure. Have you ever encountered such a situation? How should this problem be solved?

The following diagrams are the flow field diagrams of the abnormal alpha.water, U, and p.