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-   -   Problem Definition :Cavitation in Francis Turbine (http://www.cfd-online.com/Forums/cfx/25798-problem-definition-cavitation-francis-turbine.html)

 Amit Roghs May 12, 2008 02:46

Problem Definition :Cavitation in Francis Turbine

I want to define cavitation in francis turbine. I am using the Rayleigh Plesset method, but am not aware of what value to feed for Saturation Pressure. I would like to know what CFX understands with Saturation Pressure & what should be its value.

Regards, Amit Roghs

 dia aisa May 13, 2008 04:55

Re: Problem Definition :Cavitation in Francis Turb

hi please chich the tutorial in ANSYS - cfx to know how u can set your pressure,the tutorial in cfx help- tutorial

 Amit Roghs May 14, 2008 01:43

Re: Problem Definition :Cavitation in Francis Turb

I have checked up but there is no information regarding mentioning saturation pressure.

 UnderwaterAlex May 14, 2008 13:48

Re: Problem Definition :Cavitation in Francis Turb

Tutorial 19 - Cavitation around a hydrofoil: Under "Preparing a simulation with cavitation" - "Adding cavitation."

Saturation pressure for Water/Water Vapor @ 25 C = 3574 Pa

That's all the info I have.

Best of luck,

-Alex

 Amit Roghs May 26, 2008 04:33

Re: Problem Definition :Cavitation in Francis Turb

Dear Alex, Thanks for the response, but how to reduce the value pressure at outlet, due to which cavitation incepts. I am still not understanding what saturation pressure means? Is it the pressure at which water vapour oozes out of water?

Regards, Amit

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