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-   -   Multiphase Flow n phases (http://www.cfd-online.com/Forums/openfoam-solving/58064-multiphase-flow-n-phases.html)

duderino March 15, 2005 09:35

Hi! Is in OpenFOAM a solver
 
Hi!

Is in OpenFOAM a solver for multiphase flow with more than 2 phases (with phasechange/cavitation)?

Best regards duderino

henry March 15, 2005 09:39

Not yet.
 
Not yet.

duderino March 16, 2005 05:36

Hi Henry What does this mea
 
Hi Henry

What does this mean? Are there any plans to do this?

Best regards duderino

henry March 16, 2005 05:45

There are current plans to imp
 
There are current plans to implement incompressible multiphase flow with interface capturing/VOF. We are seeking sponsorship for compressible multiphase flow which is a prerequisite for multiphase flow with cavitation.

scurtu July 4, 2006 09:20

Hello, Is in OpenFOAM a sol
 
Hello,

Is in OpenFOAM a solver for compressible multiphase (water/air) flows?

Regards,
Nicoleta

billy June 20, 2007 05:44

multiphaseInterFoam. Release 1
 
multiphaseInterFoam. Release 1.4

hsieh June 20, 2007 07:42

Hi, Based on my understandi
 
Hi,

Based on my understanding, the two-phase solver (interFoam, air/water) is incompressible.

MultiPhaseInterFoam handles air + more than two liquids (i.e., air/water/oil).

Pei

mplongjr July 31, 2007 11:57

Hi all, I've been trying to g
 
Hi all,
I've been trying to get a 3-species model running in multiphaseInterFoam (air+liquid1+liquid2) and it is behaving strangely. I have all of the alphas set up correctly (they show up in paraFoam correctly anyway). The model is simple with an inlet port for each liquid and a fixed pressure outlet at the far end of the fluid domain. The entire fluid domain is initially air and I am setting a fixed velocity for each fluid phase entering the domain. The case begins to run and I can see each phase beginning to move through the domain, but it crashes after a short time.

When I look at the results in paraFoam, the pressure (pd) is small throughout the domain accept in the inlet for the first liquid phase, where it is much higher. I've tried changing the transport properties for all three phases and it still wants the pressure in the first liquid phase to be very high, even when I switch the properties with the second phase.

Is there any way to verify that the transport properties for each phase are being used in the solution?

hsieh August 1, 2007 08:47

Hi, If you have all air in
 
Hi,

If you have all air in the domain, then, based on my past experience, run might crash. What I usually do is extend the inlet outwards, and then, initialize the extended portion with liquid. This seems to stabilize the run.

Pei

mplongjr August 7, 2007 13:50

Hi Pei.. thanks for the sugges
 
Hi Pei.. thanks for the suggestion. I tried to initialize both of the liquid inlets and it seemed to help things along but it would still sigFpe after a short while. I spent a couple of days trying out different settings and looking through posts for interFoam. I settled on using the original PCG solver from the interFoam tutorials (for pressure) as well as using upwind for the alpha terms and it is acting much more stable. The results look strange to me though, especially the way that the liquid phase entering one of the inlet ports seems to be deformed significantly by the gas phase, while the other liquid phase is not.

http://www.cfd-online.com/OpenFOAM_D...ges/1/5099.gif

The transport properties that I'm using are:

Gas Phase (red)
nu [0 2 -1 0 0 0 0] 1.8e-05;
rho [1 -3 0 0 0 0 0] 1.22;

Liquid Phase 1 (blue)
nu [0 2 -1 0 0 0 0] 1.6e-06;
rho [1 -3 0 0 0 0 0] 800.0;

Liquid Phase 2 (green)
nu [0 2 -1 0 0 0 0] 2.5e-07;
rho [1 -3 0 0 0 0 0] 1140.0;

I realize that the second liquid phase is significantly more dense than the first but would not expect it to interact so much with a fluid that is 650 times less dense.

Any ideas?

Mike

hsieh August 8, 2007 13:27

Hi, Mike, multiPhaseFoam do
 
Hi, Mike,

multiPhaseFoam does not have MULES implemented. Standard interFOAM has MULES which ensures boundness.

If you can email me the case, then, I might take a look at it when I have the chance. I only have some experience with multiPhaseFoam and this is quite a while ago.

Pei

mplongjr August 8, 2007 14:38

hmmm.. I just tried to run the
 
hmmm.. I just tried to run the damBreak4phaseFine case and it crashes when I run it in parallel, but runs fine on a single processor. I'm going to try to run my case with the original settings on one processor (it's going to take a few days!).

Have you run that tutorial in parallel successfully?

hsieh August 9, 2007 09:08

Hi, Mike, You were correct.
 
Hi, Mike,

You were correct. Parallel run failed after few time steps. You should report this as a bug.

Pei

hsieh August 9, 2007 09:10

Hi, Mike, Just curious, whi
 
Hi, Mike,

Just curious, which OpenFOAM version are you using?

Even the serial run, damBreak4PhaseFine in OF-1.4.1 tutorial failed on me, while, OF-1.4 has no problem.

Pei

mplongjr August 9, 2007 10:45

You are also correct... http:/
 
You are also correct... http://www.cfd-online.com/OpenFOAM_D...part/happy.gif with 1.4 (compiled with gcc 4.2.0) the damBreak4PhaseFine tutorial runs OK. It only seems to be broken in 1.4.1 (compiled with gcc 4.2.1).

I'm going to have to play around with it some more...

msrinath80 September 16, 2007 17:05

Hi there, The bug report wa
 
Hi there,

The bug report was filed and Henry has promptly explained what's happening and how to overcome the problem. Please check the following link:

http://www.cfd-online.com/OpenFOAM_D...tml?1189975304

mplongjr January 28, 2008 19:34

Any update on Henry's proposed
 
Any update on Henry's proposed improvements to multiphaseInterFoam?.. i.e.. MULES

also..

I've been using lesInterFoam with some success designing a simple liquid/liquid mixer ejecting into air, but I'd like to do the same with two different density streams... of course that would mean something like lesMultiphaseInterFoam.. did I name that right?.. ;)

Mike

virginie_e January 23, 2009 08:53

Hello, I am a new user of
 
Hello,

I am a new user of OpenFOAM and I would like to use the solver multiphaseInterFoam to simulate a three-phase surface free flow.

Could you please give me some references (if there are any) on the algorithm used in the solver in OpenFOAM 1.5?

Thank you!

Virginie

virginie_e January 23, 2009 08:55

Hello, I am a new user of
 
Hello,

I am a new user of OpenFOAM and I would like to use the solver multiphaseInterFoam to simulate a three-phase surface free flow.

Could you please give me some references (if there are any) on the algorithm used in the solver in OpenFOAM 1.5?

Thank you!

Virginie

chiven August 25, 2009 07:36

Dear Henry and other experts of multi-phase flow, would you please give a comment on my problem shown in
http://www.cfd-online.com/Forums/ope...lculation.html
I think the issue is interesting, but a little difficult.
Thank you very much.
Best regards,
Chiven


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