CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLOW-3D (http://www.cfd-online.com/Forums/flow-3d/)
-   -   Cavitation model (http://www.cfd-online.com/Forums/flow-3d/124976-cavitation-model.html)

thanhctt October 16, 2013 13:19

Cavitation model
 
How to simulate Cavitation model in Flow 3D? Can you help me?

JBurnham October 17, 2013 12:00

Do you need to model the actual bubbles forming and collapsing, or just find out where cavitation will occur? If you need to model the actual cavities (because they change the flow path around the cavitating object), then use the full cavitation model, and specify PCAV = cavitation pressure and CAVRT = characteristic cavity formation time = 0.001 second. The model will run very slowly. If you just want to know where cavitation will occur, either use the 'Cavitation Potential' model, or just look at pressure output around your objects of interest.

thanhctt October 20, 2013 04:48

How about Cavitation potential value?
 
I have the value of Cavitation potential in my simulation but I do not understand about this value.

JBurnham October 21, 2013 11:37

Cavitation Potential is a cell-by-cell value that is the time-integral of the magnitude of the difference between local cell-centered pressure and user-specified cavitation pressure. It is the sum of that difference for all time steps where the local pressure is less than the cavitation pressure. Because the units are pressure x time (dt), they are the same as dynamic viscosity.


All times are GMT -4. The time now is 16:17.