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

energy absorption instead generation

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 28, 2009, 06:51
Default energy absorption instead generation
  #1
New Member
 
Join Date: Mar 2009
Posts: 15
Rep Power: 17
bohis is on a distinguished road
Hello there,

I face ti very interesting thing. My problem is related to viscous dissipation. My job is 2d axisymmetric tube. The non-newtonian fluid is the flowing medium. The inlet temperature is 19°C. The tube external wall is cooled by water (temp of 5 °C). In the core of flow, where there is almost no velocity gradient, I can clearly see drop temperatures about 2°C. In near wall region, there is heat generation, thus temperatures are more than 19°C.
Could anybody please explain to me this strange artificial heat absorption. I cannot even mathematically imagine, how it is even possible.
many thanks!!
Honza
bohis is offline   Reply With Quote

Old   August 29, 2009, 14:11
Default viscous heating
  #2
New Member
 
Join Date: Mar 2009
Posts: 15
Rep Power: 17
bohis is on a distinguished road
any idea, please!! ?? come on, guy. I do know..
bohis 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
ATTENTION! Reliability problems in CFX 5.7 Joseph CFX 14 April 20, 2010 15:45
Energy absorption/ reflection coeff/ Define_Adjust A8anato_psofimi FLUENT 0 February 18, 2004 07:01
Latest News in Mesh Generation Robert Schneiders Main CFD Forum 1 February 18, 2000 00:48
Latest new in mesh generation Robert Schneiders Main CFD Forum 0 February 16, 2000 07:12
Latest news in mesh generation Robert Schneiders Main CFD Forum 0 March 2, 1999 04:07


All times are GMT -4. The time now is 05:54.