|
[Sponsors] |
January 31, 2004, 00:38 |
which model is preferred?
|
#1 |
Guest
Posts: n/a
|
hi ppl, repeating same old question, In your view, which is the better model in multiphase models and some suggestions for simulating a closed vertical cyl. tank with liq. hydrogen filled upto some 80% and remaining filled with vapor hydrogen, a constant heat flux is applied on side walls (cyl. wall) or all sides. We have to simulate natural convection and thermal stratification in it and surface evaporation at liq. vap interface at saturation. thnks and regds prasanth
|
|
January 31, 2004, 07:48 |
Re: which model is preferred?
|
#2 |
Guest
Posts: n/a
|
Hello, The VOF model seems to suit your problem best. However i think yur gonna have to write a udf to take into account the interfacial evaportaion. A source term in the equation solving the phases interface can help you to compute the mass and energy transfer due to evaporation. The difficulty for me will be to implement this source term ONLY AT the interface. Also you can perfectly realised that with the euler euler model. hope this can help. Cheers, thomas
|
|
January 31, 2004, 08:05 |
Re: which model is preferred?
|
#3 |
Guest
Posts: n/a
|
Dear Thomas, Thanks for your kind reply. I tried with mixture model. Even VOF model is doing , the temperature profiles and stream contours are not in acceptable way. Presently I am putting source terms in the continuity equations of liquid and vapr and energy equations for evaporation. but since it is homogeneous fluid, I am not assure of the equation I am using, i.e. there is no particular references available. I would be thankful, if you can convey me some if you came across. one more thing , mine is natural convection problem with interface evaporation, so that turbulence panel, effect of buoyancy is not getting when we select multiphase model. I HAVE STUDIED TO A MIN,. LEVEL ABOUT EULER-EULER MODELING AND FORMULATION.
If you can and willing to, we can proceed our discussions in e-mail. thnks and regds prasanth |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
question about turbulence model selection and sensitivity | karananand | Main CFD Forum | 1 | February 26, 2010 04:41 |
Centrifugal Pump and Turbulence Model | Michiel | CFX | 12 | January 25, 2010 03:20 |
Problems bout CFD model of biomass gasification, Downdraft gasifier | wanglong | FLUENT | 2 | November 25, 2009 23:27 |
help for different between les model (subgrid-scale model) | liuyuxuan | FLUENT | 1 | October 2, 2009 15:25 |
Grid resolution for full-scale and down scaled model | gravis | Main CFD Forum | 0 | October 2, 2009 10:27 |