[dinhanh]

Hi,

I am writting UDF using the Tani cavitation other than models in Fluent. The compliler worked good. However, I am having some question that I do not clear.

1. From contour plot of pressure in Fluent, the minimum pressure is the value of saturated vapor pressure, which we set for cavitation model. This maybe clipped by Fluent, because the real pressure should be lower than the saturated vapor pressure to have evaporation.
1.1 So my question (maybe stupid ) is: the pointed pressure in Cavitation UDF p[c] is the non-clipped pressure?
1.2 I think it is non-clipped pressure because the cavitation occured. So how can I plot the real non-clipped pressure in contour plot?

2. In UDF manual: the rate of evaporation and condensation

R=min/max(+-mdot,0)*f(l/v)

f(l/v) is the mass fraction of phases. And fluent UDF is calculated for mdot only. So to implement cavitation correctly, should we divide the source for to f(l/v) to get mdot?

Thank you!