UDF of flow over oscillating cylinder 2D case

imharoon1 · August 27, 2011, 05:28

Sir I am recent into the UDFs and trying to simulate the flow over the oscillating cylinder.The UDF for cylinder oscillation is

#include "udf.h"
#include "dynamesh_tools.h"

DEFINE_CG_MOTION(cilindro1,dt,vel,omega,time,dtime )
{ vel[0]=0; vel[1]=10*sin(100*time); omega[1]=0.0; omega[0]=0.0; }

But when i hook it with cylinder it give me error
Warning: incorrect cg motion UDF cilindro1 on zone 12 (assuming no motion)
I have attached my problem domain as well.
My email address is imharoon1@gmail.com
Regards Haroon

saifullahkhalid · August 27, 2011, 06:50

You may check this problem on the following url which has been posted.
I don't know it works or not. But it may be helpful.

http://www.cfd-online.com/Forums/flu...r-problem.html

Regards!

imharoon1 · August 27, 2011, 07:08

Sir It is just coincidence.I am trying to contact you the whole day but your cell was switched off.At last i have put my problem on the site and you are the first person who respond on that.
Thanks
Regards Haroon

niravtm007 · August 28, 2011, 01:46

hiii friends i am entirely new to using udf's in fluent. I have a cubical geometry, with two inlets on perpendicular adjacent faces. i have to implement udf to only one of the conditions.
i have two cases
1) parabolic velocity inlet ( space varient)
2) sinusodial velocity velocity inlet ( time variant)
can any one pls send me the udf ( codes) ...

August 27, 2011, 06:50	Reply	#2
saifullahkhalid New Member Saif Ullah Join Date: Aug 2011 Posts: 10 Rep Power: 14	You may check this problem on the following url which has been posted. I don't know it works or not. But it may be helpful. http://www.cfd-online.com/Forums/flu...r-problem.html Regards! jzc likes this.

August 27, 2011, 07:08	Thanks	#3
imharoon1 New Member Haroon Join Date: Aug 2011 Posts: 6 Rep Power: 14	Sir It is just coincidence.I am trying to contact you the whole day but your cell was switched off.At last i have put my problem on the site and you are the first person who respond on that. Thanks Regards Haroon

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
UDF to measure Mass Flow Rate	a.lynchy	Fluent UDF and Scheme Programming	31	October 4, 2018 14:10
benchmark: flow over a circular cylinder	goodegg	Main CFD Forum	12	January 22, 2013 11:47
flow around a cylinder	pXYZ	Main CFD Forum	14	July 25, 2011 10:05
flow resistance of cylinder in parallel flow	Ralf Schmidt	Main CFD Forum	3	May 11, 2009 02:26
Free surface boudary conditions with SOLA-VOF	Fan	Main CFD Forum	10	September 9, 2006 12:24

August 28, 2011, 01:46		#4
niravtm007 Member Nirav Join Date: Jul 2011 Posts: 43 Rep Power: 14	hiii friends i am entirely new to using udf's in fluent. I have a cubical geometry, with two inlets on perpendicular adjacent faces. i have to implement udf to only one of the conditions. i have two cases 1) parabolic velocity inlet ( space varient) 2) sinusodial velocity velocity inlet ( time variant) can any one pls send me the udf ( codes) ...