Cavitation

March 19, 2005, 11:31

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

March 19, 2005, 20:03

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.

March 22, 2005, 08:20

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

March 19, 2005, 11:31	Cavitation	#1
Atzaru Guest Posts: n/a	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

March 19, 2005, 20:03	Re: Cavitation	#2
Jörn Beilke Guest Posts: n/a	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.

March 22, 2005, 08:20	Re: Cavitation	#3
mateus Guest Posts: n/a	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

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