CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Boundary condition?

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

LinkBack Thread Tools Display Modes
Old   August 25, 2006, 13:49
Default Boundary condition?
Posts: n/a
I have a vertical heated pipe. I want to model a small suction tap in the side of the pipe, where i specify the flow rate at this tap. Then this fluid will be cooled down and injected back in the pipe a little above the suction tap. What boundary condition would i use for this suction tap, since i want to specify the flowrate for this internal section. (I need to inject the same fluid, because it is a diffusion problem, so I need the composition sucked out the same as put back in, but just lower temperature). Thanks in advance
  Reply With Quote

Old   August 28, 2006, 08:04
Default Re: Boundary condition?
Posts: n/a
For compressible flow, you can use a mass flow inlet for both places. Or for the upper tap you could use a pressure outlet and give it a target mass flow rate.

For incompressible flow, you could calculate the average velocity at the two taps and apply velocity inlet BCs. You can also use the pressure outlet with a target mass flow in incompressible flow.

Hope this helps, and good luck, Jason
  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
Domain Imbalance HMR CFX 5 October 10, 2016 05:57
Boundary Conditions Thomas P. Abraham Main CFD Forum 20 July 7, 2013 05:05
Setting outlet Pressure boundary condition using CAFFA code Mukund Pondkule Main CFD Forum 0 March 16, 2011 04:23
How exactly the "pressure outlet" bdry condition compute properties on the boundary? yating9901 FLUENT 3 June 28, 2010 12:26
How to set boundary condition in Fluent for the fo Peiyong FLUENT 1 November 10, 2006 12:44

All times are GMT -4. The time now is 06:14.