CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

Drag coefficient of square cylinder

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

LinkBack Thread Tools Display Modes
Old   November 28, 2010, 16:08
Default Drag coefficient of square cylinder
New Member
Join Date: Nov 2010
Posts: 4
Rep Power: 8
tonka is on a distinguished road
I'm testing a new CFD code using the turbulent flow around a square cylinder as a validation case. Pulblished drag coefficient Cd (measured and CFD) are typically between 2.0-2.1 for Re of 20000. My initial 2D runs gave Cd of 2.8 which is significantly higher than established number. At this point I can either try finer mesh size or move to 3D which takes a lot longer. My question is, can one get the 2.0 - 2.1 drag coeff. using 2D modeling?
tonka is offline   Reply With Quote

Old   March 15, 2014, 13:08
New Member
Join Date: Jan 2014
Posts: 1
Rep Power: 0
nidhul 07 is on a distinguished road
yes ofcourse . i had done the simulation with Re=22000 and i obtained the value of cd=1.98
(kw sst model )
nidhul 07 is offline   Reply With Quote

Old   April 2, 2014, 21:42
Join Date: Mar 2009
Location: adelaide, SA, Australia
Posts: 32
Rep Power: 10
mali is on a distinguished road
Hi All,

Thanks for posting this topic. I also got about the same value, CDmean = 2.13 and CLrms = 1.36, using 2d kw-sst model and a wall function. The number of cell along the edge is 30 x 4edges.

But when I refine the grid to 80 x 4edges and without wall function (y+ < 3), the CDmean drop to 1.57 and CLrms drop to 0.45. Any comment??

mali is offline   Reply With Quote


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
drag coefficient of cylinder Avijit FLUENT 12 April 23, 2017 03:26
Drag Coefficient Verification around Cylinder MFerris CFX 44 May 11, 2015 18:27
Incorrect Drag and Drag Coefficient for flow over a cylinder ozzythewise Main CFD Forum 8 June 13, 2012 06:24
Coefficient DRAG and LIFT - Cylinder 3D Jwolf CFX 11 February 4, 2010 06:08
Solver and geometry choose for drag coefficient calculation around circular cylinder at large Re lin OpenFOAM Running, Solving & CFD 3 April 16, 2009 10:50

All times are GMT -4. The time now is 19:02.