CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > CFX

radiation of a body

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

LinkBack Thread Tools Display Modes
Old   January 6, 2009, 17:32
Default radiation of a body
Posts: n/a
Does anyone know how to model radiation of a body (copper solid block) heated to a certain temperature?

I would like that body to loose energy depending on the temperature, but only due to radiation (cause Im trying to model a behaviour of a heater in high vacuum conditions 10-5 Pa), can u do that in Ansys?

thanks in advance!!!
  Reply With Quote

Old   January 7, 2009, 17:39
Default Re: radiation of a body
Glenn Horrocks
Posts: n/a

CFX has a number of radiation models. The discrete transfer model is probably appropriate here. The Monte Carlo model is also applicable but will require a much longer run time.

If the geometry is simple (no reentrant bits) and the far-field is roughly constant temperature you can forget a radiation model and put a heat transfer flux of emissivity * Stefan Boltzmann * (T^4 - T_far^4). If this approximation is good it will be much quicker and easier to do.

If your simulation is in a high vacuum and you only want the heat transfer then turn the fluid solver off using the expert parameters.

Glenn Horrocks
  Reply With Quote

Old   January 13, 2009, 06:41
Default Re: radiation of a body
Posts: n/a
Thank you very much for your help, I will try the heat transfer flux method the.. Regards.. Wojtek
  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
Surface incident radiation Pipiola FLUENT 0 August 11, 2009 15:46
Multiphase radiation in CFX Luk_Fiz CFX 5 March 17, 2009 03:51
CHT with radiation and body is rotating harish kumar CFX 0 February 1, 2008 12:00
Radiation: definitions visatron CFX 7 January 8, 2004 15:25
Fluent incident radiation problem Michael Schwarz Main CFD Forum 0 October 21, 1999 05:56

All times are GMT -4. The time now is 02:58.