Oscillatory cylinder -- CFD Online Discussion Forums

January 31, 2014, 03:51

Oscillatory cylinder

alireza_b

Member

alireza

Join Date: Jul 2009

Posts: 32

Rep Power: 17

alireza_b is an unknown quantity at this point

Hi
I try to simulate this paper:

A. Rehman, K. Kontis, Synthetic Jet Control Effectiveness on Stationary and Pitching Airfoil. Journal of Aircraft, 2006

in this paper, Dt is 0.0001.
When I use this time step flow field is wrong but when I use 0.001 flow field is correct.
I don't Know why?
Could you help me?

I attached these images.
1- steady state before unsteady calculation.
2- unsteady calculation with Dt=0.0001
3- unsteady calculation with Dt=0.001

Excuse me title is oscillatory airfoil, no oscillatory cylinder

Attached Images

	steady state.jpg (46.3 KB, 8 views)
	unsteady with Dt=0.0001.jpg (55.8 KB, 7 views)
	unsteady with Dt=0.001.jpg (50.2 KB, 6 views)

« Previous Thread | Next Thread »

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

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 Forum Rules

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
how to set inlet and outlet BC for oscillatory flow around a circular cylinder	November	OpenFOAM Pre-Processing	2	June 2, 2020 10:08
benchmark: flow over a circular cylinder	goodegg	Main CFD Forum	12	January 22, 2013 12:47
Incorrect Drag and Drag Coefficient for flow over a cylinder	ozzythewise	Main CFD Forum	8	June 13, 2012 07:24
Oscillatory cylinder in a static flow medium	teopetre	FLUENT	2	December 20, 2011 01:31
[blockMesh] Specifying boundary faces failes in blockMesh	blaise	OpenFOAM Meshing & Mesh Conversion	0	May 10, 2010 04:56

All times are GMT -4. The time now is 00:36.