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Vapor fraction in chtMultiRegionFoam

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Old   April 19, 2018, 04:28
Default Vapor fraction in chtMultiRegionFoam
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MABH
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How can I add a vapor fraction in the chtMultiRegionFoam?
Is for implementing a phase change simulation using that solver.
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Old   August 12, 2020, 22:34
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Quote:
Originally Posted by MABH View Post
How can I add a vapor fraction in the chtMultiRegionFoam?
Is for implementing a phase change simulation using that solver.
Have a method?
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Old   August 14, 2020, 19:32
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In the ESI development line of OpenFOAM (openfoam.com) there is the solver chtMultiRegionTwoPhaseEulerFoam which can do what you want. See https://www.openfoam.com/releases/op...nd-physics.php
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Old   August 14, 2020, 23:07
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Originally Posted by jherb View Post
In the ESI development line of OpenFOAM (openfoam.com) there is the solver chtMultiRegionTwoPhaseEulerFoam which can do what you want. See https://www.openfoam.com/releases/op...nd-physics.php
Thank you for your reply. My two-phase model is based on interCondensatingEvaporatingFoam, which is quite different in writing from TwoPhaseEulerFoam. So I want to implant interCondensatingEvaporatingFoam into chtMultiRegionFoam. Do you think it is feasible? I have been in contact with openfoam for a few months, and many things are not very clear. Thank you for your guidance.
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Old   August 15, 2020, 18:45
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There are two "challenges":

The first one is to get a new solver based on chtMultiRegionFoam. There you have to replace the solver in the fluid folder with your base solve (interCondensatingEvaporatingFoam). This is just "programming", but a a lot.

The second one is you have to find new boundary conditions for the wall where you model what happens physically there. Boiling/condensation? Then you have to implement it. If you look at the solver of ESI and the corresponding wall modelling, you can see, this is even more work. How much time do you have? Do you have help by co-workers? This sounds more like a at least one PhD thesis than e. g. a master thesis.
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Old   August 16, 2020, 03:04
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Quote:
Originally Posted by jherb View Post
There are two "challenges":

The first one is to get a new solver based on chtMultiRegionFoam. There you have to replace the solver in the fluid folder with your base solve (interCondensatingEvaporatingFoam). This is just "programming", but a a lot.

The second one is you have to find new boundary conditions for the wall where you model what happens physically there. Boiling/condensation? Then you have to implement it. If you look at the solver of ESI and the corresponding wall modelling, you can see, this is even more work. How much time do you have? Do you have help by co-workers? This sounds more like a at least one PhD thesis than e. g. a master thesis.
Thank you for your reply. By consulting online information, I am currently modifying the fsiFoam in extend-4.0, but still face great challenges. For example, changing the single phase of the liquid zone to two phases, introducing temperature, etc. Yes, I am currently at the master's level and the program is part of the master's thesis.
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Old   August 17, 2020, 10:48
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Quote:
Originally Posted by jherb View Post
There are two "challenges":

The first one is to get a new solver based on chtMultiRegionFoam. There you have to replace the solver in the fluid folder with your base solve (interCondensatingEvaporatingFoam). This is just "programming", but a a lot.

The second one is you have to find new boundary conditions for the wall where you model what happens physically there. Boiling/condensation? Then you have to implement it. If you look at the solver of ESI and the corresponding wall modelling, you can see, this is even more work. How much time do you have? Do you have help by co-workers? This sounds more like a at least one PhD thesis than e. g. a master thesis.
I am modifying the chtMultiRegionFoam with interCondensatingEvaporatingFoam, some problem happen in the createFluidFields.H. I cannot declare thermoFluid correctly, may you have an answer? Thanks!

Info<< "*** Reading fluid mesh thermophysical properties for region "
<< fluidRegions[i].name() << nl << endl;
Info<< " Adding to thermoFluid\n" << endl;
thermoFluid.set(i, twoPhaseMixtureEThermo::New(UFluid[i],phiFluid[i]);



./fluid/createFluidFields.H: In function ‘int main(int, char**)’:
./fluid/createFluidFields.H:50:48: error: reference to ‘New’ is ambiguous
50 | thermoFluid.set(i, twoPhaseMixtureEThermo::New(UFluid[i],phiFluid[i]);
|
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