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

Pressure boundary on buoyancy-driven flow

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 18, 2001, 00:25
Default Pressure boundary on buoyancy-driven flow
  #1
raymond
Guest
 
Posts: n/a
I was studying the scenario that the room with fire connected with a high and long narrow space with geometry size 30m(L)x1.6m(w)x40m(H), where the top, bottom and long sides are connected to the outspace. I defined those openings as pressure boundary conditions. The room opening is connected at somewhere of long and high side wall. The problem is that before the heated air flow into this narrow space, the airflow velocity has increased to extremely large values within a few time steps. I think it's result of pressure boundary at four side of domains (top, bottom, left and right). But how to prevent such problem?
  Reply With Quote

Old   September 20, 2001, 05:25
Default Re: Pressure boundary on buoyancy-driven flow
  #2
John
Guest
 
Posts: n/a
Hi,

I don't know if you used the ENVIRONMENTAL PRESSURE option for your pressure boundary. This option is most suited for the openings like a window.
  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
Buoyancy Driven Flow - HELP! Carlos FLUENT 2 October 11, 2007 02:35
Pressure correction in Buoyancy driven flows Aditya Main CFD Forum 0 March 8, 2007 07:36
buoyancy driven flow adam FLUENT 6 February 14, 2005 05:11
buoyancy driven flow ocy FLUENT 6 December 10, 2004 14:12
buoyancy driven flow Jannis Dotsikas Main CFD Forum 3 October 9, 1998 08:24


All times are GMT -4. The time now is 00:45.