CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT


Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   March 22, 2006, 05:57
Posts: n/a
HI, My name is Jordi and I'm from Spain. Well, I have a problem with FLUENT. I am trying to simulate a radiator with Fluent, well is more a heat-exchanger than a radiator, it's is a motorcycle radiator exactly. It's like n-vertical-tubs, where the water go inside them. And the water enter the raditior from the top and go out from the bottom. None of the tubs are conected in the radiator body. I mean There is a one tub in the top, then it's subdivided in n-tub and the in the bottom the n-tubs are connected in only one tub.

For the mopment I only drew a tub and a tunnel in GAMBIT because I could use the symetry in this case. I simiulate the air through the tunnel and the water through the tub. Then I put it in T-GRID and then in FLUENT. I am trying to get a simulation of a exchange heat between them. At the moment I only get a exchange heat in that direction:

WATER (350K) -> WALL (Thickness=0.001m) -> AIR (298K)

The water allways is 350K.

The air, if the velocity is 0m/s, there is heat-exchange. And if the velocity is 20m/s i can't see or there isn't a heat-exchange.

What I want is the reverse process, I mean:

AIR (298K) -> WALL (Thickness=0.001m) -> WATER (350K)

Try to get the Water Temperature in the outlet about 310K. ANd can see the temperature change through the tub.

And the Air Temperature arround the tub about 300-310 K, more or less.

My problem is: In first place, I don't know exactly the meaning of the Thermal Conditions in the WALL Pannel. I think I could need the CONVECTION in the Thermal COndition, but I don't know how to show up that. In second place, I woukld like if somebody could help me with that. If somebody don't get what I said, please let me know and I will explain my case more carefully. And finally, congratulations for the web and thanks to everybody for help somebody like me who don't know so much about FLENT. Thanks a lot,


  Reply With Quote

Old   March 31, 2006, 11:30
Posts: n/a
Ok, what are your BC? I suppose: -mass flow at the water inlet and a pressure outlet at the end of the tube -velocity inlet at the air inlet and p-outlet long away from the tube -on the wall u must use a coupled criteria.

  Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
unsteady heat transfer model problem Beryl FLUENT 0 July 13, 2011 00:26
natural convection mehrdadeng CFX 10 February 25, 2011 06:25
question about Heat transfer between two phases with VOF model sooroo3 FLUENT 0 February 15, 2011 04:24
Convective Heat Transfer - Heat Exchanger Mark CFX 6 November 15, 2004 16:55
is there heat transfer option in multiphase model gayaz FLUENT 1 July 16, 2003 12:13

All times are GMT -4. The time now is 11:33.