CFD Online URL
[Sponsors]
Home > Forums > FLUENT

Outlet Boundary Condition ?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 12, 2008, 16:26
Default Outlet Boundary Condition ?
  #1
Maria
Guest
 
Posts: n/a
I am modeling jet mixing in a tank and need help choosing an appropriate outlet boundary condition. The jet will be modeled using a constant velocity inlet and I need to define an outlet condition (ideally just a mass flow outlet) which is needed to keep the volume of fluid in the tank constant. Any suggestions will be appriciated.
  Reply With Quote

Old   August 12, 2008, 17:08
Default Re: Outlet Boundary Condition ?
  #2
Bryan
Guest
 
Posts: n/a
If you use a pressure-outlet then you will see a check box where you can turn on a target mass flow rate. Be careful using the velocity-inlet BC on this problem. I don't know your exact problem but it seems like a mass-flow-inlet might be better. GOOD LUCK
  Reply With Quote

Old   August 14, 2008, 02:33
Default Re: Outlet Boundary Condition ?
  #3
Smith_K
Guest
 
Posts: n/a
If the flow is incompressible then Velocity inlet and mass flow inlet are identical. Velocity inlet and Pressure Outlet BC's should be sufficient. Regards,

  Reply With Quote

Old   August 20, 2008, 09:30
Default Re: Outlet Boundary Condition ?
  #4
Ravi Shankar
Guest
 
Posts: n/a
The flammable fluid jetting out of a container needs the pressure difference and stochiometric fuel constants as input or as source terms.

So use the Pressure outlet boundary, mass flow rate also should govern actually.

Go through the tutorials on Combustion problem using Chemical reaction rates.
  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
outlet boundary condition Nina Schiepel CFX 2 July 12, 2008 16:27
outlet boundary condition Arman FLUENT 2 September 22, 2007 14:08
VOF Outlet boundary condition in cfd - ace JM Main CFD Forum 0 December 15, 2006 09:07
Outlet Boundary Condition Tang Kuei FLUENT 1 May 22, 2006 18:18
outlet boundary condition neil CFX 1 June 17, 2002 01:57


All times are GMT -4. The time now is 14:31.