CFD Online Logo CFD Online URL
Home > Forums > FLUENT

outlet boundary condition

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

LinkBack Thread Tools Display Modes
Old   September 19, 2007, 13:54
Default outlet boundary condition
Posts: n/a
I'm modeling a cylindrical combustion chamber with inlet velocity B.C and outlet pressure B.C. in the finite rate chemistry mode. Do i need to set the mass fraction of species at the outlet? If yes, how should i know them? Fluent tutorial_11 has set the B.C. at the outlet 0.23 for O2 and 0.77% N2, something seems to be wrong! where are CO2 and H2O?
  Reply With Quote

Old   September 19, 2007, 16:02
Default Re: outlet boundary condition
Posts: n/a
you do not need to set the specie mass fractions at the outlet, they will be calculated in the simulation instead
  Reply With Quote

Old   September 22, 2007, 13:08
Default Re: outlet boundary condition
red lemon
Posts: n/a
The specified values are those to be used for cases of reverse flow on outlets. In such cases some faces become inlets and need corresponding inlets species fractions.
  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
Outlet Pressure-flow coupled boundary condition (Windkessel) cfdfsi Fluent UDF and Scheme Programming 1 October 12, 2011 10:01
Boundary Condition outlet natantyt FLUENT 0 September 27, 2010 15:30
RPM in Wind Turbine Pankaj CFX 9 November 23, 2009 05:05
inlet and outlet boundary condition for turbomachinery solution siamak1424 OpenFOAM 2 August 15, 2009 11:14
Outlet boundary condition CN FLUENT 6 May 22, 2005 09:37

All times are GMT -4. The time now is 13:56.