[buerskin]

Hi,

I am trying to simulate a wave flume experiment in FLUENT.

I have the present udf which i have found online (shown below),

#include "udf.h"
#include "dynamesh_tools.h"
DEFINE_CG_MOTION(oscillate,dt,vel,omega,time,dtime )
{
Thread *t;
face_t f; /* define the variables */
t = DT_THREAD(dt);
begin_f_loop(f,t) /* loop over each face in the zone to create an array of data */
{
vel[0]=-2;
}
end_f_loop(f,t)
}

This currently only gives velocity in one direction (x-direction at - 2m/s)

However, I want a mathematical operation for an oscillating wall.

The wall is to move 0.3m to the left and then 0.3m to the right. The frequency used in the experiment is 0.45Hz, so each loop should take 2.2s. I have looked at COS() functions for this but i am struggling to understand this.

Any help with this mathematical operation would be appreciated.

Thank you

Ruari

[AlexanderZ]

0.3*cos(2.827*x)

best regards