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

flow over a cylinder

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 10, 1998, 13:52
Default flow over a cylinder
  #1
Toby Wilcox
Guest
 
Posts: n/a
I am a beginner at CFD, just taking my first class actually. The assignment is flow over a cylinder. Can anyone help me??? I am not clear on computing metrics or the PSOR method. Thanks for the help!!
  Reply With Quote

Old   December 11, 1998, 14:44
Default Re: flow over a cylinder
  #2
prasad Patnaik
Guest
 
Posts: n/a
Hi,

Simulating the flow past a circular cylinder is indeed one of the bench mark problems, and is like an "acid test" for any numerical scheme. Ability to simulate the strong Reynolds number dependency associated with the flow is the real crux of the problem. Simulating the flow separation, wake, laminar vortex shedding, transition, turbulent vortex shedding etc. makes the problem more fascinating.

Still hundreds of research papers are being written (both experimental and computational) due to the engineering relevance of the circular geometry. To understand the current state of the art, see the masterly review on this subject by Prof.Williamson (1996) (annual reviews of fluid mechanics, vol.28, pp.477-539)

If it is an assignment problem, the objective should be clear. One of the following could be your aims,

(1). If the flow is highly viscous (Re<5), or inviscid be happy by solving the Laplace equation (Del^2 psi=0), in order to obtain the streamline pattern.

(2). Solve the Navier-Stokes equation, simulate separation behind the body and other wake characteristics. (5 < Re < 250)

(3). Solve the Reynolds averaged N-S equations with an appropriate turbulence model and simulate the turbulent vortex street. (250 < Re < infinity). The quest to find out the most suitable turbulence model is still on! You may have to resort to DNS or LES.

For (3) you may wish to refer the classical paper by Prof.Leschziner (1993) (Journal of Wind Engineering and Industrial aerodynamics, Vol.46&47, pp.37-51)

with regards, Prasad Patnik
  Reply With Quote

Old   February 1, 1999, 14:02
Default Re: flow over a cylinder
  #3
Odenir de Almeida
Guest
 
Posts: n/a
Hi,

I am beginning my master degree thesi in this area, and would like to change information about this problem. Contact me: odenir@dem.feis.unesp.br
  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
benchmark: flow over a circular cylinder goodegg Main CFD Forum 12 January 22, 2013 12:47
1 Was FSI for a flow over a cylinder vmlxb6 CFX 17 May 16, 2011 02:29
Moving a Cylinder in cross flow after solving Dynamics equations of motion maruthamuthu_venkatraman OpenFOAM 1 November 19, 2009 14:55
Flow over a flat plate & Flow over a cylinder cfdxue Main CFD Forum 0 November 27, 2007 00:26
Flow over a cylinder Anna Main CFD Forum 9 March 24, 2006 15:32


All times are GMT -4. The time now is 11:45.