Stability of reactingTwoPhaseEulerFoam with wall boiling simulations

achref_rabhi · June 19, 2019, 07:03

Dear all,

I am trying to model the boiling flow, in a pipe (2D, wedge BC), using reactingTwoPhaseEulerFoam. The cases with a rectangular geometry work good and give fair results. When I change the geometry to a pipe (2D wedge or 3D pipe), the simulation diverges and gives very high temperature values. I used different mesh configurations, different applied heat fluxes, disable the energy equation for the gas phase, fvOption to limit the temperature but without any result. It always diverges. I even tried to do the same simulation set up for the wall boiling tutorial case but with a pipe geometry but it stills diverge.
Does any one have experience with this solver to simulate wall boiling cases? This will be a real help for me.

Thank you in advance

Achref

sjohn2 · November 21, 2019, 18:44

HI

I am simulating a similar problem. What kind of boundary conditions did you put for p and p_rgh for inlet and outlet?

June 19, 2019, 07:03	Stability of reactingTwoPhaseEulerFoam with wall boiling simulations	#1
achref_rabhi New Member Achref Rabhi Join Date: Sep 2018 Posts: 6 Rep Power: 7	Dear all, I am trying to model the boiling flow, in a pipe (2D, wedge BC), using reactingTwoPhaseEulerFoam. The cases with a rectangular geometry work good and give fair results. When I change the geometry to a pipe (2D wedge or 3D pipe), the simulation diverges and gives very high temperature values. I used different mesh configurations, different applied heat fluxes, disable the energy equation for the gas phase, fvOption to limit the temperature but without any result. It always diverges. I even tried to do the same simulation set up for the wall boiling tutorial case but with a pipe geometry but it stills diverge. Does any one have experience with this solver to simulate wall boiling cases? This will be a real help for me. Thank you in advance Achref

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November 21, 2019, 18:44		#2
sjohn2 Member Stanley John Join Date: Sep 2018 Posts: 79 Rep Power: 7	HI I am simulating a similar problem. What kind of boundary conditions did you put for p and p_rgh for inlet and outlet?