CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > OpenFOAM

How to impose radiative boundary conditions

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

LinkBack Thread Tools Search this Thread Display Modes
Old   February 1, 2024, 08:56
Default How to impose radiative boundary conditions
New Member
Join Date: Apr 2023
Posts: 2
Rep Power: 0
mark_bose is on a distinguished road
Hi all,

I am facing a problem imposing radiative boundary condition for a heat tansport problem using OpenFOAM 11.

To be more precise the condition i would like to impose is on surface flux q:
q = \epsilon \sigma_{SB} (T^4 - T_{env}^4)
Where T is the temperature evaluated on the surface.

The closest type of BC I found is "externalTemperature" that seems suitable for convective boundary conditions. It also allow to set an emissivity but it is not clear to me how it works since I am obliged to define also a heat transfer coefficient.

A way to solve the problem could be writing a temperature dependent heat transfer coefficient in order to account for radiation, something like:
h = \epsilon\sigma_{SB} (T^2 + T_{env}^2)(T + T_{env})
It should be easy but I couldn't figure out how to do that.

So, how can I impose radiative BC?
mark_bose is offline   Reply With Quote


boundary condition, openfoam 11, radiation

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
Out File does not show Imbalance in % Mmaragann CFX 5 January 20, 2017 10:20
Velocity vector in impeller passage ngoc_tran_bao CFX 24 May 3, 2016 21:16
Basic Nozzle-Expander Design karmavatar CFX 20 March 20, 2016 08:44
Error finding variable "THERMX" sunilpatil CFX 8 April 26, 2013 07:00
Water subcooled boiling Attesz CFX 7 January 5, 2013 03:32

All times are GMT -4. The time now is 09:57.