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compressibleTwoPhaseEulerFoam pEqn missing code for particle pressure |
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June 15, 2012, 11:28 |
compressibleTwoPhaseEulerFoam pEqn missing code for particle pressure
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#1 |
Member
bruce
Join Date: May 2009
Location: Germany
Posts: 42
Rep Power: 16 |
Hello,
I have found that compressible version of twoPhaseEulerFoam has missing code as shown below, which accounts for particle pressure in solid momentum equation. Which is being accounted in pressure loop. Code:
if (g0.value() > 0.0) { phiDraga -= ppMagf*fvc::snGrad(alpha)*mesh.magSf(); } if (kineticTheory.on()) { phiDraga -= rUaAf*fvc::snGrad(kineticTheory.pa()/rhoa)*mesh.magSf(); } |
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June 23, 2012, 13:41 |
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#2 |
Member
bruce
Join Date: May 2009
Location: Germany
Posts: 42
Rep Power: 16 |
Resolved by commit 5e27d9890131ea032a51bf2d0d0d3fe6ae724673
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August 14, 2012, 07:14 |
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#3 |
New Member
Join Date: Feb 2012
Posts: 3
Rep Power: 14 |
Dear Bruce,
from your post I found that compressibleTwoPhaseEulerFoam is not working well. Can you inform me at which location the missing a "ppDrag" term has to be included in pEqn.H of compressibleTwoPhaseEulerFoam. A second question is: Is it possible to simulate an isothermal problem with compressibleTwoPhaseEulerFoam? If not, did you know if twoPhaseEulerFoam is now working well? Best regards, Nicole |
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August 14, 2012, 08:54 |
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#4 |
Member
bruce
Join Date: May 2009
Location: Germany
Posts: 42
Rep Power: 16 |
Hi,
Which version of the solver are you using? There are many recent updates to compressibleTwoPhaseEulerFoam in git version 2.1.x. I have no issues using the latest version. compressibleTwoPhaseEulerFoam can solve temperature for both phases. But twoPhaseEulerFoam has no such facility. You have two choices while using compressibleTwoPhaseEulerFoam. Set isothermal BC everywhere. Or, comment out temperature solution in the solver and make it cold flow solver. Best, Bruce |
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August 14, 2012, 09:25 |
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#5 |
New Member
Join Date: Feb 2012
Posts: 3
Rep Power: 14 |
Hi Bruce,
now I use the latest release version 2.1.1 With twoPhaseEulerFoam of previous versions I have bad experiences, because in the freeboard region of a fluidization bed downward high velocities of the solid arise. Because in the release notes of version 2.1.1 nothing about this solver exists, I am unsure if the module twoPhaseEulerFoam was corrected. That is why I decide to work with compressibleTwoPhaseEulerFoam, although my problem is isothermal. Now, my problem is that after certain time the field "pa" is blowing up in certain cells at the baffle boundary situated in the bed. Actually, I am looking for a bug-free 2 phase Euler-Euler code, because I am trying since 2 years to use OpenFoam for fluidization problems and after each test I realize that the cod has bugs. Many thanks for your help, Nicole |
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April 8, 2013, 04:08 |
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#6 | |
Senior Member
Dongyue Li
Join Date: Jun 2012
Location: Beijing, China
Posts: 838
Rep Power: 17 |
Quote:
Bruce,can compressibletwophaseeulerfoam works on a tet mesh? I have tried twophaseeulerfoam but failed. regards, |
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July 31, 2013, 09:20 |
is there any tutorials or solved examples on compressibleTwoPhaseEulerFoam
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#7 |
Member
Anil Kunwar
Join Date: Jun 2013
Posts: 64
Rep Power: 11 |
i need to learn about compressibleTwoPhaseEulerFoam. are there any tutorials or explanation of examples related to this solver in OpenFoam?
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July 31, 2013, 09:45 |
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#8 |
Member
bruce
Join Date: May 2009
Location: Germany
Posts: 42
Rep Power: 16 |
annier,
there are 3 tutorials being shipped with OF. see for example in, https://github.com/OpenFOAM/OpenFOAM...haseEulerFoam/ but no explanations of problem setup. |
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August 1, 2013, 08:30 |
thank you
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#9 |
Member
Anil Kunwar
Join Date: Jun 2013
Posts: 64
Rep Power: 11 |
Dear Bruce,
thank you very much for your kindness. |
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August 1, 2013, 08:47 |
my query on the tutorials
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#10 |
Member
Anil Kunwar
Join Date: Jun 2013
Posts: 64
Rep Power: 11 |
dear bruce,
the tutorials bubbleColumn and mixerVessel2D are also present in twoPhaseEulerFoam. what codes or files are added in those tutorials of compressibleTwoPhaseEulerFoam inorder to account for the compressibility? it would be easier for me to learn about these tutorials if you would explain me the difference between these tutorials with the same names. thanking you in advance. |
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August 1, 2013, 09:32 |
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#11 |
Member
bruce
Join Date: May 2009
Location: Germany
Posts: 42
Rep Power: 16 |
Hi, Sorry I ve been away using these solvers for long time. but first you could carefully observe the differences in the problem setup for both cases and come up with general understanding. and later on dig into the differences in the code itself. may be it is easier to start with "fluidisedBed" problem.
Regards, |
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August 1, 2013, 22:53 |
thank you
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#12 |
Member
Anil Kunwar
Join Date: Jun 2013
Posts: 64
Rep Power: 11 |
dear bruce,
thank you very much. |
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August 11, 2013, 16:55 |
energy equation in compressibleTwoPhaseEulerFoam
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#13 |
New Member
Josefine Wilms
Join Date: Sep 2009
Posts: 10
Rep Power: 16 |
Hi
Does anybody know what the following two lines in the EEqn.H file of compressibleTwoPhaseEulerFoam mean? Code:
+ heatTransferCoeff*he1/Cpv1/rho1 - fvm::Sp(heatTransferCoeff/Cpv1/rho1, he1) Regards Josefine |
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