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

Vortex Shedding by CFDesign

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

LinkBack Thread Tools Display Modes
Old   October 6, 2010, 06:11
Default Vortex Shedding by CFDesign
New Member
John Moore
Join Date: Oct 2010
Posts: 9
Rep Power: 9
Joke is on a distinguished road
Hi, Everyone
I'm joke. I am the newbie of this CFD filed.
I'm trying to learn both in univesity and myself to improve my CFD skill.
I tried to simulate vortex shedding by CFDesign.
I set up transient model, reynold no=1000, time step size=0.01, turbulence model k-epsilon with default other parameters setting(turbulence intensity 5%, Turb/Lam ratio 100, Cmu=0.09,etc).
I ran up to 4000 time step with 10 sub iteration.
But I still havn't got any vortex(you could see image below).
I tried to simulate this condition
the other CFD software such flowork, I got vortex easily.
So Could any guild me what I'm done wrong and what should I do?

Thank for advance
Best regard
Joke is offline   Reply With Quote

Old   October 12, 2010, 21:16
New Member
Join Date: Jun 2009
Posts: 25
Rep Power: 10
nuimlabib is on a distinguished road
actually if u use transient u can find the vortex shedding phenomena. by monitoring per time step or flow time. if u waited until you simulation finished, of course u couldn't find the vortex shedding because after sometimes the flow will be steady. i suggest u to use fluent and u can see the vortex shedding occurred at how many time after starting simulation.
nuimlabib is offline   Reply With Quote

Old   October 18, 2010, 11:30
Default Vortex shedding..
New Member
luke mihelcic
Join Date: Feb 2010
Posts: 2
Rep Power: 0
lukemihelcic is on a distinguished road
I set up a very similar simulation and was able to capture vortex shedding. The only thing I changes was the sub iteration, the default is 10, I switched to 3. I also saved at certain interval to animate the simulation. You also want to add slip condition to the top and bottom wall, you will also need a pretty dense mesh. If you have any additional questions the guys at should be able to take a look at your set and give some additional advise. let me know how it goes...

lukemihelcic 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
K-Epsilon for Vortex Shedding Sham FLUENT 33 March 29, 2017 05:48
Transiet Animation - vortex shedding derz CFX 5 May 10, 2010 09:21
Vortex shedding behind cylider in cross flow Muthu FLUENT 0 March 6, 2006 11:29
vortex shedding jay kumar Main CFD Forum 6 January 27, 2001 10:25
basic vortex shedding john Main CFD Forum 4 November 6, 2000 14:23

All times are GMT -4. The time now is 23:20.