[conthula]

Hello Every one
I'm from VietNam, i'm reseaching about AUV - Autonomous Underwater Vehicle, i tried to simulate the movement of AUV follow a sine wave using Dynamic mesh in Ansys Fluent.

I have success by simulate the AUV moving linear, but with the sine wave i have failed.

This is the UDF code i use for linear movement

#include "udf.h"

DEFINE_CG_MOTION(car_velocity, dt, cg_vel, cg_omega, time, dtime)
{
  cg_vel[0] = 5.0;
  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;
}

or this

#include "udf.h"

static real velx = 0.0;
DEFINE_CG_MOTION(box, dt, vel, omega, time, dtime)
{
	NV_S(vel, =, 0.0);
	NV_S(omega, =, 0.0);
	velx = 0.05* sin(3.14145927*time / 10.);
	vel[0] = velx;
	Message("time=%f vel[0]=%f\n", time, vel[0]);
}

Both of them give me what you want about the linear movement of AUV


Hope someone can help me with the sine wave movement UDF, or give me some hint. I willing to buy it, if someone have.

Thanks you very much.

[AlexanderZ]

what problem do you have, if everything works well?