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

Turbulent concentric annulus

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 6, 2004, 03:51
Default Turbulent concentric annulus
  #1
JonS
Guest
 
Posts: n/a
Hi all,

I've done some (Fluent) simulations of turbulent flow of a Newtonian fluid in a concentric annulus. I want to compare the results in terms of velocity distribution with explicit analytical predictions. I know there are numerous analytic expressions for the calculation of laminar flow velocity distribution in concentric annuli, but does anyone know if there are equivalent equations for turbulent flow? My search so far has come up with nothing; the subject seems to be avoided in an explicit analytical sense.

Yours in hope!

JonS
  Reply With Quote

Old   August 9, 2004, 20:22
Default Re: Turbulent concentric annulus
  #2
Seb
Guest
 
Posts: n/a
Hi Jons, I do not think there are any analytical solutions for your problem (but am not 100% sure on that matter). Usually, analytical solutions are found for simple 1D problem (or problems that can be expessed in 1D by a change of variable). By definition, turbulent problems are 3D and time dependent. I think the best you can do, is try to find experimental data or correlations in the litterature. Have you tried the ercoftac site (http://imhefwww.epfl.ch/lmf/ERCOFTAC/)?

  Reply With Quote

Old   August 10, 2004, 06:57
Default Re: Turbulent concentric annulus
  #3
JonS
Guest
 
Posts: n/a
Thanks Seb, I'll have a look!
  Reply With Quote

Old   August 10, 2004, 07:02
Default Re: Turbulent concentric annulus
  #4
JonS
Guest
 
Posts: n/a
There's no flow in annuli on ercoftac site, but I have uncovered something in 'Transport Phenomena' (2nd ed.) by Bird, Stewart and Lightfoot
  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
CFX Treatment of Laminar and Turbulent Flows Jade M CFX 6 January 26, 2013 10:11
Single annulus concentric cylinder Satya prakash Main CFD Forum 0 February 3, 2011 00:40
Turbulent Dispersion for Coal Combustion gravis CFX 2 March 24, 2010 00:56
setting value of turbulent intensity and turbulent viscosity ratio in wind tunnel nuimlabib Main CFD Forum 0 August 4, 2009 00:05
LES concentric annulus Alex FLUENT 0 June 14, 2005 14:48


All times are GMT -4. The time now is 05:10.