Hi,
Woaw, that s a quick reply ! :D Well, i have two terms : - one due to evaporation at a heated wall, which is calculated using Kurul and Podowski model, and it is absolutely independent on the phase fraction - one due to condensation in the bulk, which is directly proportional to the void fraction. Best, /Edouard |
I would start not including them in the pEqn, and treating them as they appear in the momentum equation. If you notice this destabilizes the solution, you can easily move them to the pEqn.
Best, |
Hi,
Ok, thank you very much for your help! I'll try that. Best, /Edouard |
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Chiven |
It has been done by Oliveira and Issa in one of their papers:
Numerical aspects of an algorithm for the Eulerian simulation of two-phase flows, Numerical aspects of an algorithm for the Eulerian simulation of two-phase flows, Vol. 43, Issue 10--11, pp. 1177 -- 1198, 2003 I tried it some time ago when I started working on the multi-fluid code, and abandoned it, since it did not lead to significant improvements for what I need. If your problem is specifying appropriate wall boundary conditions, you can do that either using p or p_rgh. Best, |
Thank you for the information. I am going to read it. Chiven
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Dear People,
I have a small doubt over the boundary and initial conditions. I am not quite sure about why do we need to specify both Ub and p at both inlet and outlet and the walls. My understanding is , we would not quite need pressure at the walls. at all. I hope this makes sense Best wishes Prashant |
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You need a condition on each variable, or you would not be able to define the value of the variable on the boundary itself (in some cases you could actually extrapolate, but still you need to specify you want that). Best, |
Multiphase solid-gas
hi,
I would like to simulate circulating fertilized bed in OpenFoam...I am new in it.Could somebody tell me which solvers are available for this. thanks in advance Recep |
Porous Media
Hi.
I am trying to add a porous media to twoPhaseEulerFoam, I am confused about how to deal with the velocity equation. Can anyone give me a hint on how to modify UEqn file from twoPhaseEulerFoam? |
Hi there!
I was wondering if there is a complete manual/documentation of the twoPhaseEulerFoam solver as it is programmed in OpenFOAM version 2.4.0? Thanks in advance :) Kind regards, Laurien |
Hi, Laurien
I don't think there is a "complete" documentation out there. Maybe you can look at this instead: https://drive.google.com/file/d/0B2l...ew?usp=sharing http://powerlab.fsb.hr/ped/kturbo/Op...chePhD2002.pdf and then: http://www.sciencedirect.com/science...32591011003652 http://www.sciencedirect.com/science...45793016301438 Hope it helps! |
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I have very quick question related to twoPhaseEulerFoam. I am also working on porous media using twoPhaseEulerFoam with combination of Darcy(source). I have question related to pressure term. This solver has pressure term which should be for each phase I guess. Can you give some hint how is it solving pressure? Is it separate for each phase like Pa and Pb? Or its mixer pressure or average pressure? The reason of this question is that i want to add capillary pressure for porous media. Please correct if my way of asking is not correct. Regards, Umer |
Does twoPhaseEulerFoam work for a liquid-solid system?
Hello Paul,
I am wondering whether you worked your problem out at the end, and whether you could direct me to your papers/thesis for reference. Here, I want to use twoPhaseEulerFoam to simulate a solid/liquid slurry transport in long horizontal pipes like in this reference. Yang, Yan, Haoping Peng, and Chuang Wen. "Sand transport and deposition behaviour in subsea pipelines for flow assurance." Energies 12.21 (2019): 4070. Your valuable comments would be greatly appreciated! Thanks! Min Quote:
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