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Old   March 15, 2005, 09:35
Default Hi! Is in OpenFOAM a solver
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Duderino
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Hi!

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

Best regards duderino
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Old   March 15, 2005, 09:39
Default Not yet.
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Not yet.
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Old   March 16, 2005, 05:36
Default Hi Henry What does this mea
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Hi Henry

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

Best regards duderino
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Old   March 16, 2005, 05:45
Default There are current plans to imp
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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.
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Old   July 4, 2006, 09:20
Default Hello, Is in OpenFOAM a sol
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Hello,

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

Regards,
Nicoleta
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Old   June 20, 2007, 05:44
Default multiphaseInterFoam. Release 1
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multiphaseInterFoam. Release 1.4
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Old   June 20, 2007, 07:42
Default Hi, Based on my understandi
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Pei-Ying Hsieh
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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
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Old   July 31, 2007, 11:57
Default Hi all, I've been trying to g
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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?
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Old   August 1, 2007, 08:47
Default Hi, If you have all air in
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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
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Old   August 7, 2007, 13:50
Default Hi Pei.. thanks for the sugges
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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.



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
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Old   August 8, 2007, 13:27
Default Hi, Mike, multiPhaseFoam do
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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
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Old   August 8, 2007, 14:38
Default hmmm.. I just tried to run the
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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?
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Old   August 9, 2007, 09:08
Default Hi, Mike, You were correct.
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Hi, Mike,

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

Pei
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Old   August 9, 2007, 09:10
Default Hi, Mike, Just curious, whi
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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
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Old   August 9, 2007, 10:45
Default You are also correct... http:/
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You are also correct... 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...
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Old   September 16, 2007, 17:05
Default Hi there, The bug report wa
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Srinath Madhavan (a.k.a pUl|)
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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
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Old   January 28, 2008, 19:34
Default Any update on Henry's proposed
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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
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Old   January 23, 2009, 08:53
Default Hello, I am a new user of
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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
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Old   January 23, 2009, 08:55
Default Hello, I am a new user of
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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
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Old   August 25, 2009, 07:36
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J. Cai
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Dear Henry and other experts of multi-phase flow, would you please give a comment on my problem shown in
Multiphase flow calculation
I think the issue is interesting, but a little difficult.
Thank you very much.
Best regards,
Chiven
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