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

Vortex Shedding & Cd on Cylinder

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   March 20, 2009, 13:29
Default Vortex Shedding & Cd on Cylinder
  #1
New Member
 
Francis Wu
Join Date: Mar 2009
Posts: 2
Rep Power: 0
Franciswu21 is on a distinguished road
Hello Gents,

I am working on a 2D model to simulate a the vortex shedding on a cylinder placed in a low speed wind tunnel. I also downloaded a tutorial from FLUENT website, but that Re = 150, whilest mine is Re = 100,000.

The parameters in my test case are: D = 1m, rho = 100,000kg/m3, U = 1 m/s, mu = 1, transient calculation, and aim to get the DRAG COEFFICIENT. I have tried laminar, and k-epsilon model with all 4 available turbulence specification methods in FLUENT (K and epsilon, intensity and length scale, intensity and viscosity ratio, intensity and hydraulic diameter). All gave me quite different results. Some of them just indicate the flow is still attach behind the cylinder.

Could you please suggest me how to set the proper values and get a result that is closed to the empirical Cd = 1.1?

Thank you very much,

Francis
Franciswu21 is offline   Reply With Quote

Reply


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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Motion of cylinder due to vortex shedding ACHILLEAS TSOMPANOS FLUENT 3 November 24, 2006 04:06
Vortex shedding for square cylinder zonexo Main CFD Forum 8 March 30, 2006 16:11
Vortex shedding from a cylinder Cylinder Case Phoenics 4 February 21, 2006 09:18
Vortex shedding from a cylinder Mark Phoenics 1 May 8, 2003 13:00
Vortex Shedding Circular Cylinder Ray Mahon Main CFD Forum 1 March 15, 2002 00:38


All times are GMT -4. The time now is 21:53.