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-   -   Re: Reference pressure for Cavitation model (http://www.cfd-online.com/Forums/cfx/26360-re-reference-pressure-cavitation-model.html)

CFD USER September 5, 2008 15:16

Re: Reference pressure for Cavitation model
 
Hello,

How do we define the reference pressure for simultaing a flow over a hydofoil with cavitation model. Cavitation model requires to define saturation pressure in absolute terms but to minimize the errors in pressure computation for flow over a hydrofoil it is suggested to use a reference pressure of 1atm.

your input is very appreciated.

Thanks, CFD user

Glenn Horrocks September 7, 2008 19:41

Re: Reference pressure for Cavitation model
 
Hi,

Set the reference pressure at the default pressure level in the domain. I assume you are doing a hydrofoil in a normal atmosphere, so a reference pressure of 1 atm is appropriate.

Glenn Horrocks

CFD USER September 9, 2008 07:36

Re: Reference pressure for Cavitation model
 
Thanks Glenn for your response. So if we are using a reference pressure of 1atm how should we define the saturation presssure. Should I still define the saturation pressure as 3500pa.

Thanks a lot for your time, CFD user

Glenn Horrocks September 9, 2008 23:00

Re: Reference pressure for Cavitation model
 
Hi,

This is discussed in the documentation. I think it has to be set as an absolute pressure but you should check.

Glenn Horrocks

Torque_Converter June 2, 2012 22:59

Sorry to bring up this old thread, but to be sure about something, would one have to alter the saturation pressure if one alters the reference pressure then?

ghorrocks June 3, 2012 07:01

Have a look in the documentation to check whether the saturation pressure is defined as an absolute or relative pressure. I am pretty sure it is an absolute pressure.


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