[soheilr]

Hi,
I am trying to simulate 2D tank sloshing with maximum rotation amplitude of 4.0 deg. How should I model the rotation of tank with udf? Below is my written udf about this issue.

Please provide me your help on this udf.
King Regards!

#include <stdio.h>
#include <math.h>
#include "udf.h"

DEFINE_CG_MOTION(Oscillating_body, dt, vel, omega, time, dtime)
{
real ampl,max_amp,omg;

/* reset velocities */
NV_S (vel, =, 0.0);
NV_S (omega, =, 0.0);

/* motion */
max_amp = 0.0698 ; /* amplitude of rotation in radians (4.0 deg) */
omg = 2.0; /* angular frequency */
ampl = omega[2] * time;
if (ampl < max_amp) {
omega[2] = omg;
}
else if (ampl >= max_amp) {
omega[2] = -omg;
}
}