CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Main CFD Forum

Swirl flows

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 13, 1998, 07:07
Default Swirl flows
  #1
Krzysztof Krecisz
Guest
 
Posts: n/a
I am looking for anything about swirl flows.
  Reply With Quote

Old   November 17, 1998, 04:11
Default Re: Swirl flows
  #2
Armin Hofstädter
Guest
 
Posts: n/a
This seems to be a pretty general approach. Strongly swirled? Weakly swirled? Combustion?...

I posted a message containing information about my project on Nov. 5th. Maybe we can help each other.

  Reply With Quote

Old   November 17, 1998, 13:02
Default Re: Swirl flows
  #3
Krzysztof Krecisz
Guest
 
Posts: n/a
What does it mean strongly or weakly swirled ?
  Reply With Quote

Old   November 20, 1998, 22:05
Default Re: Swirl flows
  #4
Daejin,Kang
Guest
 
Posts: n/a
Dear Armin,

I have studied for the swirl flows of nozzle........... For experimently , I found strong swirl to nozzle orifice(outlet).........but not CFD.. What's the problem for CFD.......? geometry? boundary condition? or........select of the turbulent model?

help me...please....
  Reply With Quote

Old   November 21, 1998, 13:20
Default Re: Swirl flows
  #5
Abdul Aziz Jaafar
Guest
 
Posts: n/a
Dear Daejin

It is interesting to note that not all computations could give aggreement with experimental, provided that you sure that the boundary condition and the setting of the flow and heat transfer problem are correct. Again to make sure that your solution correct, choose to performed computation with more grid points.

In my experience sometime it is good before put ourself in the new problem to begin with a test cases. In your problem, I could try flow on the pipe with no swirl. Assuming laminar flow, then you can compare with analatical solution. If my solution agree with it, then I am very confidence that my setting, grid and boundary condition are correct. Then you add boundary condition for swirl and turbulence variables in it.

Hope this help

A. Aziz Jaafar
  Reply With Quote

Old   December 11, 1998, 16:34
Default Re: Swirl flows
  #6
Mei Chen
Guest
 
Posts: n/a
I'm trying to model transient solution of the flow field in cyclone in 3D using DSM turbulence model. I had difficulty in converging it. My time step has to be very very small(0.000001), and I can only run 10 time steps each time. Otherwisw the core will be generated and I got nothing. Does anybody know what might be the problem and how to solve it?

Thank you in advance.

Mei Chen Ph.D Student in Chemical Engineering Department of U of A
  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
Howe to get swirl velocity component in 2D axisymtric swirl modeling Perra Fluent UDF and Scheme Programming 1 December 12, 2009 03:37
Swirl in Pressure Swirl Atomizer varunrajendra FLUENT 0 August 19, 2009 12:09
Quantifying Swirl Ianto Main CFD Forum 0 April 27, 2009 10:54
2d axisymmetric with swirl heather OpenFOAM Running, Solving & CFD 5 July 28, 2005 17:20
Swirl in backflow on pressure outlets Jonas Larsson FLUENT 17 February 3, 2000 03:14


All times are GMT -4. The time now is 16:05.