Solver for two-phase (liquid-gas) flows + cavitation + gas demixing in pumps?

petroo · September 11, 2010, 10:12

Hello to everyone!

As a novice to OpenFOAM I scanned the available solvers for their potential to treat a somewhat specialized material combination: I'd like to simulate a fluid consisting mainly of oil, but carrying a small amount of air bubbles (assumed slip = 0) and having a certain amount of air molecularly solved in it.

The oil is subject to rather hefty pressure gradients, at least in certain regions of the calculation domain, that may cause both demixing of solved air and cavitation of the oil.

Scanning the out-of-the-box solvers coming with OpenFOAM I did not find one that would fit my expected needs: in the multiphase domain there is only one dealing with two compressible fluids (compressibleInterFoam), while there is another one (cavitatingFoam) dealing with cavitation but not different fluids.

Another approach would be the creation of a custom solver, as explained in http://www.openfoam.com/features/creating-solvers.php. But I do not feel capable enough for such an approach.

So, could someone here give a comment or a suggestion to my above stated practical problem, please?

Kind regards,

Peter

akidess · September 13, 2010, 06:43

What about interPhaseChangeFoam?

petroo · September 13, 2010, 06:56

Quote:

Originally Posted by akidess

What about interPhaseChangeFoam?

In my understanding it treats only incompressible fluids. As one of the fluids in my problem is air and subject to rather substantial pressure changes this deemed not adequate to me.

Regards,

Peter

sfigato · April 29, 2013, 08:00

Hi Peter,

Have you found some solution?
I am dealing with the same problem!

Regards
Marco

petroo · April 29, 2013, 08:14

Hello Marco,

Quote:

Originally Posted by sfigato

Have you found some solution?
I am dealing with the same problem!

Sorry, no. I did not dig deeper into the problem, though, as the project was set to a temporary rest for the time being. Maybe I'll take it up some time, but not at the moment.

So, if anyone has become brighter on that problem, I'd love to read ...

Regards,

Peter

olivierG · April 29, 2013, 11:25

hello,

You should take a look at http://www.cfd-online.com/Forums/ope...tml#post398548

regards,
olivier

sfigato · April 29, 2013, 11:39

Hi Olivier,

thank for the hint!

Regards
Marco

September 11, 2010, 10:12	Solver for two-phase (liquid-gas) flows + cavitation + gas demixing in pumps?	#1
petroo New Member Peter Roosen Join Date: Sep 2010 Posts: 4 Rep Power: 16	Hello to everyone! As a novice to OpenFOAM I scanned the available solvers for their potential to treat a somewhat specialized material combination: I'd like to simulate a fluid consisting mainly of oil, but carrying a small amount of air bubbles (assumed slip = 0) and having a certain amount of air molecularly solved in it. The oil is subject to rather hefty pressure gradients, at least in certain regions of the calculation domain, that may cause both demixing of solved air and cavitation of the oil. Scanning the out-of-the-box solvers coming with OpenFOAM I did not find one that would fit my expected needs: in the multiphase domain there is only one dealing with two compressible fluids (compressibleInterFoam), while there is another one (cavitatingFoam) dealing with cavitation but not different fluids. Another approach would be the creation of a custom solver, as explained in http://www.openfoam.com/features/creating-solvers.php. But I do not feel capable enough for such an approach. So, could someone here give a comment or a suggestion to my above stated practical problem, please? Kind regards, Peter

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September 13, 2010, 06:43		#2
akidess Senior Member Anton Kidess Join Date: May 2009 Location: Germany Posts: 1,377 Rep Power: 30	What about interPhaseChangeFoam?

April 29, 2013, 08:00		#4
sfigato Senior Member Marco Longhitano Join Date: Jan 2013 Location: Aachen Posts: 103 Rep Power: 13	Hi Peter, Have you found some solution? I am dealing with the same problem! Regards Marco

April 29, 2013, 11:25		#6
olivierG Senior Member Olivier Join Date: Jun 2009 Location: France, grenoble Posts: 272 Rep Power: 18	hello, You should take a look at http://www.cfd-online.com/Forums/ope...tml#post398548 regards, olivier

April 29, 2013, 11:39		#7
sfigato Senior Member Marco Longhitano Join Date: Jan 2013 Location: Aachen Posts: 103 Rep Power: 13	Hi Olivier, thank for the hint! Regards Marco