[ndabir]

Hi All,

I am simulating a vibrating plate in water. The plate vibrates fast so it can create cavitation bubbles around it. So I am using Schnerr-Sauer cavitation model. Now I have some questions about this cavitation model:

1) In order for cavitation to happen, the absolute pressure must go below vapor pressure (which is 3540 Pa as default in Fluent). However, in my simulations the absolute pressure never goes below 3540 Pa. But the simulation almost predicts the location and size of the cavitation correctly.
If the pressure doesn't go below vapor pressure, then how does my simulation predict cavitation bubbles correctly?


2) mass source term in Schnerr-Sauer cavitation model (attached figure)

- if you calculate it by hand based on the values of density, vapor volume fraction, ... of a point you will get: 362 kg/m^3.s

- if you plot the mass transfer rate results in Fluent for the same point you get: 10 kg/m^3.s

why these two values are so different? what am I missing here?

[ndabir]

Why does the absolute pressure do not drop below 3540 Pa when using schnerr-sauer model for cavitation?