CFD Online Logo CFD Online URL
Home > Forums > CFX

Composite regions

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

LinkBack Thread Tools Display Modes
Old   July 28, 2007, 16:10
Default Composite regions
Posts: n/a
In order to specify the same boundary condition on multiple windows, I created a composite region including all of the windows. If I want to have a pressure of 20000 Pa on each of the windows, should I specify an opening pressure boundary condition with value 20000 Pa or 20000*(number of windows) ? Cause it depends if CFX consider this composite region as a single region or if it consider the windows independently. Same question if you specify a mass flow.

Thank you
  Reply With Quote

Old   July 30, 2007, 09:46
Default Re: Composite regions
Posts: n/a
First of all, you don't necessarily need to create a composite region, just select all of your regions when you create the boundary condition.

Pressure doesn't scale with area, so the answer is NO for a pressure inlet boundary condition. If you specify the mass flow rate, it should be the total mass flow rate, which will be applied as a CONSTANT FLUX, so this will only work divide the mass flow evenly if you have the same area on each window. If the area varies and you want a constant mass flow through each you will need separate boundary conditions.

Regards, Robin
  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
Splitting regions king_steve STAR-CCM+ 1 September 27, 2010 12:48
Connect 2 Regions Marc_r OpenFOAM 2 April 19, 2010 13:27
Composite Engine Valve Project cortez505 FLUENT 1 November 18, 2009 05:02
how to define different regions in icem ? Hammam CFX 3 July 9, 2007 12:56
refinement causes composite regions, how to solve? Harry CFX 4 December 8, 2004 06:13

All times are GMT -4. The time now is 21:48.