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Heat Flux boundary condition for multiphase problem |
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January 31, 2020, 05:09 |
Heat Flux boundary condition for multiphase problem
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#1 |
New Member
Bibin K.S
Join Date: Oct 2014
Posts: 19
Rep Power: 11 |
Deart All,
How can I define the wall heat flux boundary condition for mutliphase flows. For single phase flow we used to define this in "T" file in "0" folder for a particular patch as ( dT/dn = q/kf ) In the similar way if i wants to define for multiphase flow ie as ( dT/dn = q/keff) . where "keff" is a scalar filed and is a function of alpha as keff=alpha*kl +(1-alpha) * kv) How can I do this? Can anyone suggest a solution for this problem? Thanks & Regards, Bibin |
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January 31, 2020, 05:35 |
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#2 | |
Member
...
Join Date: May 2018
Posts: 37
Rep Power: 7 |
hi
i use groovy bc for heat flux in the wall i hope this code can help you Quote:
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January 31, 2020, 10:29 |
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#3 |
New Member
Bibin K.S
Join Date: Oct 2014
Posts: 19
Rep Power: 11 |
Thank you.... its working
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January 31, 2020, 22:55 |
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#4 |
New Member
Bibin K.S
Join Date: Oct 2014
Posts: 19
Rep Power: 11 |
Aslo can u please tell whether it changes at all timesteps or for the first timestep..?? As alpha1 is a function of time...
Thanks & Regards Bibin |
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February 2, 2020, 06:11 |
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#5 |
Member
...
Join Date: May 2018
Posts: 37
Rep Power: 7 |
yes
it changes |
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February 2, 2020, 12:05 |
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#6 |
New Member
Bibin K.S
Join Date: Oct 2014
Posts: 19
Rep Power: 11 |
Thank you so muchh...
Can I ask a quick logical question. Can we model boiling with simple Lee model (Below) without modelling the nucleation site etc.. m ̇ = rc* (1 − alphal)*ρv *(T − T sat)/Tsat for condensation T < T sat m ̇ = re* alphal*ρl *(T sat− T)/Tsat for evaporation T > T sat could you please share your thoughts.. any informations or doc?? Regards, Bibin |
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