[M.Magdy]

hi,
I'm trying to simulate wave in tank
the udf I'm using for the moving wall
apparently there some thing wrong with it because the wall moves in one direction and doesn't return back

#include "udf.h"
DEFINE_CG_MOTION(wave, dt, cg_vel, cg_omega, time, dtime)
{
cg_vel[0] = ((0.02)*(cos((80)*(CURRENT_TIME))));
cg_vel[1] = 0.0;
cg_vel[2] = 0.0;

cg_omega[0] = 0.0;
cg_omega[1] = 0.0;
cg_omega[2] = 0.0;

}

and if any one could tell me what is the different between this udf and that one.
#include "udf.h"
DEFINE_CG_MOTION(wave, dt, cg_vel, cg_omega, time, dtime)
{
cg_vel[0] = ((0.02)*(cos((80)*(t))));
cg_vel[1] = 0.0;
cg_vel[2] = 0.0;

cg_omega[0] = 0.0;
cg_omega[1] = 0.0;
cg_omega[2] = 0.0;

}
Thanks,

[oj.bulmer]

Why don't you try UDF forum?
http://www.cfd-online.com/Forums/fluent-udf/

OJ