Learning Forum

[mreza65]

Hi there,

I prepared a UDF, I was wondering to know that is it correct? 

#include "udf.h"

DEFINE_GRID_MOTION(membrane, domain, dt, time, dtime)

{

  Thread *tf = DT_THREAD(dt);

face_t f;

Node *node_p;

real x, y;

int n;

/* Set/activate the deforming flag on adjacent cell zone, which */

/* means that the cells adjacent to the deforming wall will also be */

/* deformed, in order to avoid skewness. */

SET_DEFORMING_THREAD_FLAG (THREAD_T0 (tf));

begin_f_loop (f, tf)

{

f_node_loop (f, tf, n)

{

node_p = F_NODE (f, tf, n);

 

if (NODE_POS_NEED_UPDATE (node_p))

{

 

NODE_POS_UPDATED (node_p);

x = NODE_X (node_p);

y = 0.00004*(1.0-(x*x))*sin(2.0*M_PI*560.0*CURRENT_TIME);

NODE_Y (node_p) = y;

}

}

}

end_f_loop (f, tf);

}

 

regards

[DrAmine]

Ansys staff do not debug udf. Try it and introduce some messages which help to debug.