Eulerian- Boiling Models

Omish · November 24, 2021, 02:30

I'm working on a 2-phase model with boiling involved. The working fluid is liquid nitrogen (the process is Cryogenic); I need help with two question here:
1- Why can't one get a mixture temperature (as in VOF Model) in Eulerian-Boiling models? I need to get a mass-weighted temp average at outlet, but no such option is available. Anything I can do instead?
2- There are a lot of models/modification (specially in force setup section) for boiling models, which I have no acquaintance and experience in. can anyone kindly give a brief explanation, or suggest a reference that can help me find out which options are suitable or even effective for my simulation? also any experience and recommendation is highly appreciated.
Further info about my case:
- axisymmetric pipe
- k-e RNG or standard
- scalable wall function (y+ around 15)
- velocity inlet: 20m/s
- pressure outlet about 3.9 bar
- temp inlet: 77 K
- vof gas inlet: 0.3
- wall temp: constant 293 K

qingqingliu · February 9, 2022, 11:33

This example should help you: $FOAM_TUTORIALS/heatTransfer/chtMultiRegionTwoPhaseEulerFoam/solidQuenching2D

November 24, 2021, 02:30	Eulerian- Boiling Models	#1
Omish Member Omid Shekari Join Date: Jun 2016 Posts: 43 Rep Power: 10	I'm working on a 2-phase model with boiling involved. The working fluid is liquid nitrogen (the process is Cryogenic); I need help with two question here: 1- Why can't one get a mixture temperature (as in VOF Model) in Eulerian-Boiling models? I need to get a mass-weighted temp average at outlet, but no such option is available. Anything I can do instead? 2- There are a lot of models/modification (specially in force setup section) for boiling models, which I have no acquaintance and experience in. can anyone kindly give a brief explanation, or suggest a reference that can help me find out which options are suitable or even effective for my simulation? also any experience and recommendation is highly appreciated. Further info about my case: - axisymmetric pipe - k-e RNG or standard - scalable wall function (y+ around 15) - velocity inlet: 20m/s - pressure outlet about 3.9 bar - temp inlet: 77 K - vof gas inlet: 0.3 - wall temp: constant 293 K

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February 9, 2022, 11:33		#2
qingqingliu Member Ching Liu Join Date: Sep 2017 Posts: 52 Rep Power: 9	This example should help you: $FOAM_TUTORIALS/heatTransfer/chtMultiRegionTwoPhaseEulerFoam/solidQuenching2D