[rsdsaurav]

Hello,
I am new to UDF usage in Fluent and for my project on flapping wing, the udfis not working and the rror message says that

cpp -I"C:\PROGRA~1\ANSYSI~1\v150\fluent\fluent15.0.7/src" -I"C:\PROGRA~1\ANSYSI~1\v150\fluent\fluent15.0.7/cortex/src" -I"C:\PROGRA~1\ANSYSI~1\v150\fluent\fluent15.0.7/client/src" -I"C:\PROGRA~1\ANSYSI~1\v150\fluent\fluent15.0.7/multiport/src" -I. -DUDF
ONFIG_H="<udfconfig.h>" "F:\Akij Paper\Model_2\flapping.c"
Error: F:\\Akij Paper\\Model_2\\flapping.c: line 21: structure reference not implemented


I have attached the flow diagram for reference.


Thanks in advance.

[moh_zain]

Hi you need to show the udf code

[rsdsaurav]

Hello,
I am attaching the code for your reference.

Thanks again.



#include "udf.h"
#include "dynamesh_tools.h"

real w, pi, Aroll, Apitch, roll, droll, pitch, dpitch, frequency, T;
real Ar, Ap, Ay;

DEFINE_CG_MOTION(asymflap, dt, v_cg, omega, time, dtime)

{
Thread *t;

NV_S(v_cg, =, 0.0);
NV_S(omega, =, 0.0);

if (!Data_Valid_P())
{
Message("Wrong\n");
return;
}

t=DT_THREAD((Dynamic_Thread*)dt);

frequency = 3.0;

pi = 3.141592654;

/* define motion variables */

Ar = 30.0; /*roll amplitude*/
Ap = 5.0; /*pitch amplitude*/
Ay = 0.0; /*yaw amplitude*/

Aroll = Ar*pi/180.0; /*conversion to radians*/
Apitch = Ap*pi/180.0; /*conversion to radians*/

w=2.0*pi*frequency; /*omega (radians)*/
T=1.0/frequency;

roll = Aroll*sin(w*time + pi/2);
droll = w*Aroll*cos(w*time + pi/2);

pitch = Apitch*sin(w*time);
dpitch = w*Apitch*cos(w*time);

/*euler angles initial frame mod 1*/

omega[0] = droll;
omega[1] = dpitch*1.0*cos(roll);
omega[2] = dpitch*1.0*sin(roll);

Message("time:%f omegax:%f omegay:%f omegaz:%f \n", time, omega[0], omega[1],omega[2]);
}

[moh_zain]

hi check this line t=DT_THREAD((Dynamic_Thread*)dt);
if you tray to define time the program do not need that