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

Appropriate BC

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 3, 2008, 12:45
Default Appropriate BC
  #1
selim
Guest
 
Posts: n/a
Hi,

I ran a transient laminar flow simulation. I dont know the pressure and the velocity at the outlet as a priori. What type of boundary condition should I use?

Thanks, --Selim
  Reply With Quote

Old   March 3, 2008, 17:28
Default Re: Appropriate BC
  #2
Glenn Horrocks
Guest
 
Posts: n/a
Hi,

Well, you have to know something about the boundary. If the boundary location you have chosen is not known then try moving the boundary further downstream to where it exits to atmosphere (therefore a known pressure) or some other known feature.

Glenn Horrocks
  Reply With Quote

Old   March 3, 2008, 17:32
Default Re: Appropriate BC
  #3
selim
Guest
 
Posts: n/a
Hi,

In Fluent there is outlet BC in which the normal gradient of the variables other than pressure is zero and it is applied when pressure and velocity is not known a priori.

What should I do , no idea in CFX ( I cannot extend the domain further downstream)

Anyway, thanks for the comment

--Selim
  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



All times are GMT -4. The time now is 20:26.