Source terms for alpha1 Equation for temeprature based interPhaseChangeFoam

ovie · February 8, 2010, 17:22

Hi Foamers,

I am trying to simulate falling film evaporation of a liquid using a modified form of interPhaseChangeFoam. The current implementation for phase change phenomena is based on pressure. I am trying to implement phase change due to temperature. My questions are as follows:

1.) Does anyone have an idea what the source term for alpha1 would be like i.e. how do you implement mDotAlpha1() for temperature dependence? I would also appreciate references to literature

2.) What is mDotP() and how would this be implemented for this case.

Thanks in advance for the help.
ovie

chiven · February 8, 2010, 21:15

Hi Ovie, this is the just questions I also want to know. We are doing the similar researches. I try to give some comments.

(1) Maybe we can consider the interfacial heat transfer and the latent heat.
(2) For cavitating flow div(U)=(vDotcP-vDotvP)*(p-pSat), so maybe it is not very important for our cases, we can deal with it through "div(U)=source".

I am not sure they are right, please correct me if not.

Best regards,
Chiven

February 8, 2010, 17:22	Source terms for alpha1 Equation for temeprature based interPhaseChangeFoam	#1
ovie Member Ovie Doro Join Date: Jul 2009 Posts: 99 Rep Power: 17	Hi Foamers, I am trying to simulate falling film evaporation of a liquid using a modified form of interPhaseChangeFoam. The current implementation for phase change phenomena is based on pressure. I am trying to implement phase change due to temperature. My questions are as follows: 1.) Does anyone have an idea what the source term for alpha1 would be like i.e. how do you implement mDotAlpha1() for temperature dependence? I would also appreciate references to literature 2.) What is mDotP() and how would this be implemented for this case. Thanks in advance for the help. ovie

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February 8, 2010, 21:15		#2
chiven Senior Member J. Cai Join Date: Apr 2009 Posts: 180 Rep Power: 17	Hi Ovie, this is the just questions I also want to know. We are doing the similar researches. I try to give some comments. (1) Maybe we can consider the interfacial heat transfer and the latent heat. (2) For cavitating flow div(U)=(vDotcP-vDotvP)*(p-pSat), so maybe it is not very important for our cases, we can deal with it through "div(U)=source". I am not sure they are right, please correct me if not. Best regards, Chiven