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cavitation modeling and pressure distribution

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Old   July 25, 2006, 04:35
Default cavitation modeling and pressure distribution
  #1
arazgaldy
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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
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Old   July 25, 2006, 16:22
Default Re: cavitation modeling and pressure distribution
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Frodo
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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
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Old   July 26, 2006, 02:29
Default Re: cavitation modeling and pressure distribution
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arazgaldy
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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
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