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

Vortex shedding case studies

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 10, 2005, 09:40
Default Vortex shedding case studies
  #1
Allan Cross
Guest
 
Posts: n/a
Hi all, I'm a Bach. Eng. student doing a thesis on the vortex shedding cylinder near a plane boundary.

Its a well know fact that the classic vortex shedding cylinder problem is a benchmark for testing ALL CFD packages, however I find it pretty thin on the ground any such abundance of these studies.

Could someone point me in a general direction or two to some? It would be appreciated. Some in the Sub-critical flow regime would be GREAT! (eg Re=10e3~4)

later Allan
  Reply With Quote

Old   May 10, 2005, 18:03
Default Re: Vortex shedding case studies
  #2
Sham
Guest
 
Posts: n/a
I don't actually know what you are asking but I'd suggest you use ske model and introduce some perturbation uisng the patch icon. You might get a very narrow wake only. Use unsteady solver instead.

Sham.

  Reply With Quote

Old   May 10, 2005, 18:50
Default Re: Vortex shedding case studies
  #3
Allan Cross
Guest
 
Posts: n/a
Clarification on ske: that is the standard k epsilon turbulence model correct? If it is that would give me backup on my argument to present to my thesis supervisor who still thinks laminar viscosity is appropriate (he was a pioneer of CFD writing his own code).

Perturbation: I've had probs with this, had a case not vortex shed for a night simulating, I was blaming it on the grid too fine, using 2ddp=little error. Thanks I'll just need to find this patch icon, haven't come across it before.

Later

Allan
  Reply With Quote

Old   May 11, 2005, 04:15
Default Re: Vortex shedding case studies
  #4
Sham
Guest
 
Posts: n/a
I am not sure about laminar model. I do not think it will work for a turbulent case. My supervisor developed his own CFD as well and he is using LES model. Anyway, give it a try. I have come across some references saying that they used ske model and some SA model. But, beware FLUENT has some limitation especially in the drag crisis regime. It has to accommodate to all commercial use.

Hope this will help.

Sham.
  Reply With Quote

Old   May 25, 2005, 11:57
Default Re: Vortex shedding case studies
  #5
Chetan Kadakia
Guest
 
Posts: n/a
Is this a 2d case or a 3d case? Is your thesis just on a cylinder? What makes it novel or useful? Cylinder experiments and simulations are nothing new.
  Reply With Quote

Old   May 30, 2005, 14:06
Default Re: Vortex shedding case studies
  #6
ayyappan
Guest
 
Posts: n/a
don't u know the usage of bluff especially circular cyilinder,???? y r v launching rockets unnecessarily , already we have wasted many satellites which are merely rotating earth????? i think u got it,
  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
K-Epsilon for Vortex Shedding Sham FLUENT 31 September 18, 2015 16:04
vortex shedding not captured Deloat CFX 6 February 28, 2008 05:25
instantaneous frames of vortex shedding jamal FLUENT 1 January 24, 2008 10:57
Vortex shedding in downstream over 2Dcylinder Mr.Ta FLUENT 1 May 4, 2006 05:58
case studies, vortex shedding cylinder Allan Cross FLUENT 2 May 30, 2005 14:13


All times are GMT -4. The time now is 20:21.