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

DO radiation model

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 27, 2010, 20:25
Default DO radiation model
  #1
New Member
 
Join Date: Jun 2010
Posts: 1
Rep Power: 0
melquiades is on a distinguished road
Has anyone used the discrete ordenates (DO) radiation model???
If someone has please take a look at this simple case;

I have a room (fluid, air) with adiabatic interior walls, and one exterior wall of glass (solid, semitransparent) with a radiation boundary condition (external radiation temperature =293K). No external irradiation for the moment. I start the simulation with 300 K initial domain temperature and after some iteration i found temperature below 293K (which is impossible). In fact the lower values of some parameters (emissivity, diffuse fraction) i use the lower temperature i reach (e.g.100 K).
Looks like there is a problem in the energy balance while using the DO model and some parameters (emissivity, diffuse fraction) not equal to 1.
Any solution? Thanks so much.

luisilsa@hotmail.com
melquiades is offline   Reply With Quote

Reply

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
Use of k-epsilon and k-omega Models Jade M Main CFD Forum 12 June 2, 2015 13:16
How model radiation of both solid wall and fluid£¿ Harry Qiu FLUENT 2 February 4, 2013 00:04
Help: Radiation model MANOJKUMAR FLUENT 4 November 24, 2005 03:45
definition difficulty-->DO radiation model Harry Qiu FLUENT 0 March 29, 2001 09:19
RE: Radiation model Ashutosh Joshi FLUENT 1 January 30, 2001 11:50


All times are GMT -4. The time now is 15:47.