UDF of flow over oscillating cylinder 2D case

imharoon1 · August 27, 2011, 06:28

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, 07:50

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, 08:08

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, 02:46

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, 07:50	Reply	#2
saifullahkhalid New Member Saif Ullah Join Date: Aug 2011 Posts: 10 Rep Power: 15	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, 08:08	Thanks	#3
imharoon1 New Member Haroon Join Date: Aug 2011 Posts: 6 Rep Power: 15	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

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August 28, 2011, 02:46		#4
niravtm007 Member Nirav Join Date: Jul 2011 Posts: 43 Rep Power: 15	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) ...