Boiling in a pipe

htariq · August 5, 2023, 10:25

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

h_ankur · September 9, 2023, 05:55

Same problem with me but with a horizontal pipe

h_ankur · September 9, 2023, 05:56

Getting reverse flow at the outlet and pressure divergence with complete divergence of the solution

htariq · September 10, 2023, 11:42

are you doing pseudo transient?
could you share the tutorial that you are following?

h_ankur · September 11, 2023, 02:29

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.

oscar_zagal · March 20, 2024, 08:51

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

August 5, 2023, 10:25	Boiling in a pipe	#1
htariq New Member Hassan Tariq Join Date: Sep 2021 Posts: 2 Rep Power: 0	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

September 9, 2023, 05:55	Same problem with me	#2
h_ankur New Member Ankur Join Date: Jul 2018 Posts: 5 Rep Power: 7	Same problem with me but with a horizontal pipe

September 9, 2023, 05:56	Getting reverse flow at the outlet	#3
h_ankur New Member Ankur Join Date: Jul 2018 Posts: 5 Rep Power: 7	Getting reverse flow at the outlet and pressure divergence with complete divergence of the solution

March 20, 2024, 08:51		#6
oscar_zagal New Member Oscar Zagal Join Date: Jan 2024 Posts: 12 Rep Power: 2	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 09:51.

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September 10, 2023, 11:42		#4
htariq New Member Hassan Tariq Join Date: Sep 2021 Posts: 2 Rep Power: 0	are you doing pseudo transient? could you share the tutorial that you are following?

September 11, 2023, 02:29		#5
h_ankur New Member Ankur Join Date: Jul 2018 Posts: 5 Rep Power: 7	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.