CFD Online Logo CFD Online URL
Home > Forums > FLUENT

gas flow out of a C-D channel

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

LinkBack Thread Tools Display Modes
Old   March 7, 2011, 15:32
Default gas flow out of a C-D channel
New Member
Join Date: Apr 2010
Posts: 15
Rep Power: 7
ljp is on a distinguished road
Hi dear all,

I met a problem when simulating a high-temperature gas flow through a convergent-divergent channel (the channel consists of several parts, and the last part at the end of the channel is a divergent nozzle). Since both the geometry and the boundary conditions are axis-symmetric in this case, I expect the gas flow exiting the nozzle would be axi-symmetric (centering around the axis). However, what I found is: the gas flow first shoot out of the nozzle along the centerline, then, as the iteration goes, the gas jet starts to bend and eventually follows the curve of the divergent nozzle, exiting the domain (downstream of the nozzle) from the side, instead of the outlet which is in the opposite direction from the gas inlet.

Iím confused about this behavior, and would like to know if any of you have had similar problems before, or if you could kindly point out what mistakes I made during the simulation. (although the flow channel is convergent-divergent, the flow is subsonic with a maximum Mach number of ~0.5.)
Thank you very much!

ljp is offline   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
What is the difference between liquid reactive flow and gas reactive flow? James Main CFD Forum 6 May 15, 2009 12:14
Complex problem: Open Channel Flow lett FLUENT 17 April 9, 2009 10:56
pressure outlet (open channel flow) Willem Brantegem Main CFD Forum 0 April 3, 2007 09:39
Two-Phase Buoyant Flow Issue Miguel Baritto CFX 4 August 31, 2006 12:02
About gas flow and buildings Andreas Main CFD Forum 1 October 25, 2001 13:37

All times are GMT -4. The time now is 22:11.