CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Pre-Processing

Radiation in vacuum using viewFactor

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   October 29, 2018, 10:56
Question Radiation in vacuum using viewFactor
  #1
New Member
 
Jessica Bell
Join Date: Oct 2018
Posts: 1
Rep Power: 0
Jessica6 is on a distinguished road
Hello everyone!


I'm working on my first case and it's main goal is to evaluate the heat load made by radiation.
In the analysis, there are two surfaces with significantly different temperaures. The warmer surface should emit heat to the colder one by radiation phenomen. The whole system is placed in the vacuum so no convection occurs. Those surfaces are not connected anyhow so there is no conduction.

For this purpose I decided to use chtMultiRegionFoam and viewFactors radiation model.
The results I got is qr = 1.2*10^(-38) and viewFactorField with values way above 1, which are obviously wrong.
Playing with values in viewFactorsDict made no difference.

Now my suspicion is that the program doesn't work for radiation because there is no media in between the surface. Is this can be a reason? What are the others possible reasons?

Have anyone tried to deal with radiation in vacuum?


Cheers,


Jessica
Jessica6 is offline   Reply With Quote

Reply

Tags
multiregionheater, radiation simulation, radiationmodel, vacuum chamber, view factors


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
chtMultiRegionSimpleFoam: Thermal Conduction + Surface-To-Surface Radiation Zeppo OpenFOAM Running, Solving & CFD 16 May 18, 2017 18:04
Fluent Radiation/porous media Schmitt pierre-Louis FLUENT 26 September 1, 2016 10:29
radiation modeling in vacuum mirko OpenFOAM Programming & Development 7 May 20, 2016 08:31
Monte Carlo Simulation: H-Energy is not convergating & high Incident Radiation volleyHC CFX 5 April 3, 2016 05:41
Radiation Modeling Chris89 CFX 20 August 14, 2014 07:51


All times are GMT -4. The time now is 13:40.