CFD Online Logo CFD Online URL
Home > Forums > CFX

Additional Variables at the Opening Boundary

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

LinkBack Thread Tools Display Modes
Old   August 22, 2006, 12:27
Default Additional Variables at the Opening Boundary
Posts: n/a
Hi everyone,

I am modeling a multiphase system, in which I need to introduce two Additional Varialbes (AV) for each phase (water & Air) which they would be considered as oxygen concentration in each phase...

Problem: I have an opening boundary condition at the top of my model at which, the water is freely going in/out, (of course the same water in the domain). this means that I need to be able to set the (AV)s at the OPENING condition in a way that no new water comes in (but the same water contating the specitic oxygen concentration shall only enter the domain...)

FYI, I'm using transient settings

Would highly appreciate any help/comments...


PS: in some of previuous messages I came across this;


Boundary Type = OPENING

Location = out



Option = Extrapolation



END which is interesting, but I couldn't use it without error message!!! and also in this case I don't know what happens to the AVs?
  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
Moving boundary condition (opening) kezman CFX 0 November 13, 2009 06:37
Opening BC: Normal to boundary Jan Ramboer CFX 3 September 21, 2007 15:06
Additional Variable Boundary Conditions! Li CFX 8 July 23, 2007 10:50
Additional Variables- in the Opening BC. Houman CFX 0 October 2, 2006 08:09
Solver error message!!! IoSa CFX 1 September 14, 2006 04:48

All times are GMT -4. The time now is 10:31.