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Boiling in a pipe

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Old   August 5, 2023, 11:25
Red face Boiling in a pipe
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Hassan Tariq
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Hi everyone!

I am stuck with the boiling in a pipe problem in Fluent. Fluid is water at atmospheric conditions and heat flux is applied to wall which is well blow the critical heat flux...
Niether rpi model nor non equilibrium model is converging..

Pipe is vertical
Fluent boiling model with default forces
Velocity inlet
Pressure outlet, 0 Pa gauge
1e-5 surface roughness

Need some suggestions

Thanks
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Old   September 9, 2023, 06:55
Default Same problem with me
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Ankur
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Same problem with me but with a horizontal pipe
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Old   September 9, 2023, 06:56
Default Getting reverse flow at the outlet
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Ankur
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Getting reverse flow at the outlet and pressure divergence with complete divergence of the solution
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Old   September 10, 2023, 12:42
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Hassan Tariq
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are you doing pseudo transient?
could you share the tutorial that you are following?
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Old   September 11, 2023, 03:29
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No, I am using purely transient case. And i do not have any tuttorial to following, i was following the research paper "Pal, R.K. and Kumar, R., 2021. Thermo-hydrodynamic modeling of flow boiling through the horizontal tube using Eulerian two-fluid modeling approach. International Journal of Heat and Mass Transfer, 168, p.120794." but unable to reproduce the results. If anyone can help, I will be highly grateful.
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Old   March 20, 2024, 09:51
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Oscar Zagal
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Hello

Maybe you can try with OpenFOAM v2312, I had the same problem working with Fluent, but in OF there are a tutorial called solidQuenching2D in the solver for heat transfer chtMultiRegionTwoPhaseEulerFoam that allows me to reproduce the paper of Kumar, the only problem is that you will need a very powerful computer because the solver only work transient simulation

Edit: and pseudo transient if you know how to use the PIMPLE algorithm

Last edited by oscar_zagal; March 20, 2024 at 10:51.
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Old   August 24, 2024, 07:22
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Did someone figure out a fix to this?
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