cavitation modeling and pressure distribution
 

Dear all cfd members,

I modeled the three kinds of problem in cavitation mode in fluent:

1-2-D nozzele 2-2-D hydrofoil naca0015 3-3-D marine propeller

but in all of these three cases i encountered a problem that pressure distribution falls some blew vapor pressure . fore example if define the vapor pressure 3500 pascal, then when cavitation occure i get pressure about 2500 pascal in cavitation region.

in my opinion this can not be true.

is ther any body to help me about this problem.

regards,

R.Arazgaldy

Re: cavitation modeling and pressure distribution
 

Is your case compressible, your cavitation region should be compressed and have a pressure closer to 3500 Pascal minus the surface tension forces.

Your results seems wrong because of the setup

Frodo

Re: cavitation modeling and pressure distribution
 

Dear Fredo: Thanks for your answer.

I decided to run with another method.In previous methods i only run the cases in steady condition but now i decided to run the problems in unsteady conditions from lower velocities to desires higher velocities. I think in this way may be i get better results.

thank again for your kindness.

best regards:

R.Arazgaldy