CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > Siemens > STAR-CCM+

Heat Exchanger

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

LinkBack Thread Tools Display Modes
Old   November 11, 2011, 05:09
Default Heat Exchanger
Hamza Motiwala
Join Date: Nov 2010
Posts: 41
Rep Power: 9
hamzamotiwala is on a distinguished road
Hello everyone,

I am working on a heat exchanger model which is a part of an exhaust gas recirculation system.

I define this part as a seperate porous region(so that I can restrict the flow in certain directions and also sort of create a baffle/airfilter effect) and what I am trying to do is to reduce the exit temperature of the air that enters this region.

I just define this region as a Heat exchanger.

I have tried this by giving in a fixed wall temperature and i have also tried this with the help of the "Energy transfer option". I also specify the exit temperature. I just cant get it right.

The temperature of the air at the inlet is about 350K and I want this to reduce to 320K. There is no second working fluid. The Problem is that the air always cools to a temperature below 0K within the porous region. I have tried giving in a wide range of values and its always some sort of negative temperature profile that I get. I know I am doing something wrong.

If anyone has any idea about whats happening here, I would really appreciate some advice.

If you want more specifications I can provide it or if I am not clear enough I can elaborate.

hamzamotiwala is offline   Reply With Quote


Thread Tools
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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Heat Exchanger Model sak2129 FLUENT 3 September 26, 2017 01:29
How to carry out 3D shell and Tube Heat Exchanger analysis in fluent medogalal FLUENT 3 December 30, 2015 05:28
Macro Heat Exchanger not selecting (Please help!) zdeth FLUENT 2 September 11, 2012 13:52
UDF for Heat Exchanger model francois louw FLUENT 2 July 16, 2010 02:21
Convective Heat Transfer - Heat Exchanger Mark CFX 6 November 15, 2004 16:55

All times are GMT -4. The time now is 14:42.