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

Help modeling heat sink

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   April 23, 2011, 20:10
Default Help modeling heat sink
  #1
New Member
 
Aimee
Join Date: Apr 2011
Posts: 1
Rep Power: 0
aimee is on a distinguished road
Hello,

I am very new to CFD and for my first project I am trying to model a heat sink and am having some trouble. Here is what I have got so far...
Geometry:
I have a geometry of a heat sink extruded inside of a box.
I used a boolean operation subtract, with the Target Body as the box and the Tool Body as the heat sink, I chose to perserve the Tool Body.
I then joined the 2 bodies into 1 part.

Mesh:
The mesh of the heat sink and the fluid appears to be connected sufficiently. I named the front of the box velocity_inlet, the back as pressure_outlet, and the bottom of the heat sink as a hot_surface.

Problem Setup:
Under Boundary Conditions it lists all these zones....some of which i dont understand... hot_surface, interior-part-fluid, interior-part-solid, pressure_outlet, velocity_inlet, wall-part-fluid, wall-part-fluid-part-solid, wall-part-fluid-part-solid-shadow

My thoughts were that I could just enter a temperature for the hot_surface which would simulate conduction, and a velocity at the inlet to simulate the convection that the heat sink is experiencing. In the end, I want to be able to see the temperature distribution throughout the heat sink.

This isn't working.... when I run a calculation and plot the temp contours, the hot surface is bright red, but the rest of the heat sink is solid blue (at ambient temperature) Can anyone give me any advice or links that may help? Have I approached this problem all wrong?

Thanks
aimee is offline   Reply With Quote

Old   June 3, 2011, 15:17
Default
  #2
Member
 
Join Date: Apr 2011
Posts: 30
Rep Power: 15
skullCFD is on a distinguished road
looks like you did not connect the faces between the heat sink and the fluid domains in Gambit or whatever preprocessor.
skullCFD is offline   Reply With Quote

Reply

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
Thermal Resistance Modeling of Active Heat Sinks D.Castle FloEFD, FloWorks & FloTHERM 3 August 1, 2011 07:27
Simulate heat transfer of heat sink in a box... chien87 CFX 8 February 8, 2011 04:50
how to modeling heat by fluent and ansys? njiit FLUENT 0 December 9, 2009 01:39
flow/heat transfer through heat sink (with fins)? Pei-Ying Hsieh Main CFD Forum 1 January 26, 2008 07:33
Simulation on Heat Sink Ken Adams FLUENT 4 June 26, 2007 17:03


All times are GMT -4. The time now is 06:47.