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

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

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

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

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?

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.