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

Steady state vs. mean transient analysis of flow behind a circular cylinder

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

LinkBack Thread Tools Search this Thread Display Modes
Old   June 8, 2011, 12:26
Default Steady state vs. mean transient analysis of flow behind a circular cylinder
New Member
Heini Rasmussen
Join Date: Dec 2010
Posts: 9
Rep Power: 15
Heini is on a distinguished road

I'm looking at the current reduction behind a circular cylinder in a steady flow, at Re = 2100. I have solved it with a steady state solver and k-eps turbulence model, using Fluent. But is this a good enough approach, if one needs a detailed "image" of the flow reduction behind the cylinder? My guess is that a statistical mean velocity of a transient analysis, would show a broder flow reduction path close to the cylinder, than what would be predicted from the steady state solution, due to the detail of the vortex street. Any comments about this proposal, or does anby one know of articles regarding this subject?

Heini is offline   Reply With Quote

Old   June 9, 2011, 06:47
Senior Member
Vesselin Krastev
Join Date: Jan 2010
Location: University of Tor Vergata, Rome
Posts: 368
Rep Power: 20
vkrastev is on a distinguished road
I have some experience at higher Reynolds numbers (form 1e05 to 3.6e06) in simulating the two-dimensional flow around circular cylinders. I can tell you that accounting for the vortex shedding makes a significant difference in terms, for instance, of the predicted pressure drag coefficient: applying the RNG k-epsilon turbulence model, my time-averaged URANS results were far more accurate than the steady-state RANS results.

Best Regards

vkrastev is offline   Reply With Quote


cylinder, flow reduction, steady, unsteady

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
mesh file for flow over a circular cylinder Ardalan Main CFD Forum 7 December 15, 2020 13:06
Steady state flow over cylinder vmlxb6 CFX 4 February 16, 2011 15:04
Constant velocity of the material Sas CFX 15 July 13, 2010 08:56
Flow around a sphere and a circular cylinder Francis Main CFD Forum 0 September 29, 2008 05:16
About the difference between steady and unsteady problems Lisa Main CFD Forum 11 July 5, 2000 14:37

All times are GMT -4. The time now is 18:52.