Zone motion in rotatory container

Amin_65 · November 7, 2018, 21:02

Dear all,
I want to model a rotatory container using frame motion in Ansys fluent 19. The origin of rotation in my case is (X=0.025,Y=-0.0055,Z=-0.045).
When in the corresponding UDF I wrote the following sentence to identify the rotation origin, the system gives me some errors. where is the problem? FYI: When I wrote N3V_S(origin,=,0.0); for the rotation origin everything has worked.

#include "udf.h"
DEFINE_ZONE_MOTION(fmotion,omega,axis,origin,veloc ity,time,dtime)
{
real Period = 1;
real pi = 3.14159265359;
*omega = 20*2*pi*cos(2*pi*time);
N3V_S(origin,=,0.025,-0.0055,-0.045);
N3V_D(axis,=,0.0,1.0,0.0);
return;
}

obscureed · November 8, 2018, 20:13

Hi Amin_65,

Please see the answer from Pakk here: N3V_D,N3V_S（what's the meaning） (but ignore the other answers completely!). I think this should point you towards "N3V_D(origin,=,0.025,-0.0055,-0.045);".

Good luck!
Ed

November 7, 2018, 21:02	Zone motion in rotatory container	#1
Amin_65 New Member Amin Join Date: Nov 2018 Posts: 1 Rep Power: 0	Dear all, I want to model a rotatory container using frame motion in Ansys fluent 19. The origin of rotation in my case is (X=0.025,Y=-0.0055,Z=-0.045). When in the corresponding UDF I wrote the following sentence to identify the rotation origin, the system gives me some errors. where is the problem? FYI: When I wrote N3V_S(origin,=,0.0); for the rotation origin everything has worked. #include "udf.h" DEFINE_ZONE_MOTION(fmotion,omega,axis,origin,veloc ity,time,dtime) { real Period = 1; real pi = 3.14159265359; omega = 202picos(2pitime); N3V_S(origin,=,0.025,-0.0055,-0.045); N3V_D(axis,=,0.0,1.0,0.0); return; }

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November 8, 2018, 20:13		#2
obscureed Senior Member Join Date: Sep 2017 Posts: 246 Rep Power: 12	Hi Amin_65, Please see the answer from Pakk here: N3V_D,N3V_S（what's the meaning） (but ignore the other answers completely!). I think this should point you towards "N3V_D(origin,=,0.025,-0.0055,-0.045);". Good luck! Ed