[Bobby155]

Hi,

I am a beginner in Fluent 15.0 and I am trying to realize the modelisation of a flow through an oscillating cylinder. I don't have any problem loading the UDF describing the movement of the cylinder but I can't see anthing with "Preview Mesh Motion" or even "Display Zone Motion" in the Dynamic Task page. I am using Smoothing and Remeshing as Mesh Methods.

Maybe the problem comes from the UDF I am using :

#include "udf.h"


DEFINE_CG_MOTION(pis,dt,vel,omega,time,dtime)
{
Thread*t;
face_t*f;
real A=1;
real freq=1;
real pi=3.14159265;
real w=2*pi*freq;
real v=A*w*sin(w*time);

/*reset velocities */

NV_S(vel,=,0.0);
NV_S(omega,=,0.0);
if (!Data_Valid_P()) return;


t=DT_THREAD(dt);

vel[1] = v;

}


I don't know if it is related but i am also not able to edit the Function Hooks.
This problem may have been already explained in this forum but I couldn't find any explanations.

Does someone have an answer ?

Thanks !