CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

Heat transfer from a heated plate using fins

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 11, 2012, 15:59
Default Heat transfer from a heated plate using fins
  #1
New Member
 
CFD Rockers
Join Date: Sep 2012
Posts: 3
Rep Power: 14
pathakamit is on a distinguished road
Send a message via Skype™ to pathakamit
Hi, we are simulating a simple heat transfer problem. The fins are supposed to enhance heat transfer from a plate. It consists of fins and air is being passed through them so as to cool them.

We guess that the design and mesh are correct, and perhaps we are not able to pre-define the problem. The description of our solving strategy is as follows:

1. Modelling in Pro-E
2. Importing in Ansys Workbench 14.0 Release, Fluid Flow (FLUENT)
3. DESIGN MODELLER: Creating Named Selections in Design Modeler, and specifying the domain as fluid and the fins as solid.
4. ANSYS MESH: Creating Fine Mesh with Default settings in Ansys Mesh.

5. FLUENT:
i. Creating Problem Setup: In Fluent
a) General: Pressure Based Solver, steady,
Model:
• Energy – ON
• Viscous-k-epsilon(Realizable)
b) Boundary Conditions:
• Giving an Inlet Velocity of 5m/sec at the inlet, and 300K air.
• Pressure Outlet is on by default.
• Heated Plate: Giving constant temperature of 723K
• Heat Generation Rate: 1000
• Heat transfer Coefficient: 210
• Mesh Interfaces: We defined interface connecting the interface domain and interface fins and we connected it by coupled wall.

ii. a) Solution Method:
Pressure Velocity Coupling: SIMPLE
b) Solution Initialization:
Solution Initialization: Standard Initialization(Compute From Inlet)

iii. c) Run Calculation:
No of iterations: 250

Results:
When we plot the contours, then we are getting pretty good contours as per our intuition of physical conditions but when we see the numerical values we are observing the air to leave at the same temp it enters.

MOREOVER WE HAVE USED THE SAME SETUP PROCEDURES, OF A WORK PREVIOUSLY DONE USING GAMBIT AND FLUENT 6.3, AND IN THAT WORK NO HEAT GENERATION RATE WAS GIVEN, STILL IT GAVE CORRECT RESULTS BUT IN OUR CASE WHEN WE DON’T GIVE THE HEAT GENERATION RATE (EVEN IF CHOOSE THE CONSTANT TEMPERATURE OPTION), THE PLATE COOLS DOWN.

So can anyone suggest the correct problem setup for the current case of heat transfer from a heated plate using fins.

I am attaching my problem case files, i.e. the ANSYS workbench files, using the same setup conditions, so anyone can check it out and tell the correct method.

https://www.dropbox.com/s/1csudpwioz...%20Problem.rar

OR CAN YOU SUGGEST ANY LINKS FOR SOME TUTORIAL OR VIDEOS, FOR THE CASE OF SIMPLE HEAT TRANSFER FROM A HEATED PLATE WITH FINS, SO THAT WE CAN LEARN HOW TO SET UP A HEAT TRANSFER PROBLEM FOR THE CASE OF FINS FIXED ON A HEATED PLATE.
pathakamit is offline   Reply With Quote

Old   April 30, 2013, 04:07
Default
  #2
New Member
 
john chant
Join Date: Mar 2013
Posts: 10
Rep Power: 13
john c is on a distinguished road
Hey,

Any update on this? I see this was last year, so I was wondering how you guys fixed your problem. I am dealing with a similar setup but am having a hard time creating the interface between my solid and fluid section. Did you just use "Named Selection" to name a wall at your solid and use that as one of the interfaces? If so, what do you use as the second input for the interface?



Best Regards,

John
john c is offline   Reply With Quote

Reply

Tags
ansys 13 work bench, fluent, heat and mass transfer, heat exchanger model, heat transfer cooling

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
Convective / Conductive Heat Transfer in Hypersonic flows enigma Main CFD Forum 2 November 1, 2009 22:53
How can I increase Heat Transfer at Domain Interf? B.Simon CFX 3 October 28, 2008 18:53
heat transfer on dimpled plate mech FLUENT 4 February 6, 2007 15:15
Convective Heat Transfer - Heat Exchanger Mark CFX 6 November 15, 2004 15:55
free convection heat transfer from a heated horizontal surface through a liquid to a thin cooled fin Kaushik FLUENT 1 May 8, 2000 06:47


All times are GMT -4. The time now is 05:03.