Cavitation
 

Hello!

I am simulating the flow inside diesel injectors, particularly being interested in the cavitation phenomena. Unfortunately the problem is very unstable. Very strange flow behavior is predicted by fluent. In the new version 6.2 even the old tutorial(for 6.1) file "cav" does not work.

The turbulence model is Spalart Allmaras, Pressure-Velocity Coupling SIMPLEC, discretization second order for al eq.

Does anybody have dealt with this kind of calculations? Some suggestions?

Many Thanks

Atzaru

Re: Cavitation
 

Have a look at this:

http://www.nabla.co.uk/main/mainhe36.html#cavitation

Since Foam is open source now you can try using it instead of fluent.

Re: Cavitation
 

Hi!

The model in fluent version 6.1.18 and later works ok if you make unsteady simulation. I have never achieved a stable simulation (with reasonable results) for a steady case...

hope it helps MATEUS