[ananthanarasimhan]

im getting below error while trying to load the udf file.

The UDF library you are trying to load is not compiled for 2ddp on the current platform (win64)

[`e`]

Try compiling the UDF again, if you're having trouble updating compiled UDFs then check my compiling process for Fluent UDFs with an existing library loaded.

[From_IRAN]

You are trying to load a UDF which is not compiled. Either you forgot to compile, or you tried to compile it and it failed, but you didn't notice the errors showing on your screen. Besides, compiling failure can be due to different reasons. Most common reasons:
1-Compiler is not installed on your system.
2- Use unusual characters for folder/sub folder or for UDF name such as, @, *,+, or even using "space".
3-Errors in UDF code.

[umeralizuberi]

is there any video regarding compilation of udf in visual studio?

[AlexanderZ]

Originally Posted by umeralizuberi

is there any video regarding compilation of udf in visual studio?

check youtube

[umeralizuberi]

i have a code for flapping motion in 2D can you check it, i can not find any error in it.
/* the code is written for 2D flapping chord length of 0.01 m
and Reynolds number of 157 i.e velocity = 0.229 m/s
*/

#include "udf.h"

static real alpha_dot = 0.0; /* rotational velocity */
static real x_velocity = 0.0; /* velocity in X direction */
static real y_velocity = 0.0; /* velocity in Y direction*/

DEFINE_CG_MOTION(flapping, dt, vel, omega, time, dtime)
{

Thread *t;
face_t f;
real pi = 3.14159;
real c = 0.01; /* wing chord in meters */
real amp = 0.025; /* Amplitude in meters */
real period= 0.025; /* time period in second */
real alpha; /* angle of attack */

real beta = (pi/3); /* inclination angle of stroke plane */



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

if (!Data_Valid_P ())
return;


x_velocity= -(amp*pi/(period))*cos(beta)*sin(2*pi*time/period);
y_velocity= -(amp*pi/(period))*sin(beta)*sin(2*pi*time/period);
alpha = (pi/4)-((pi/4)*sin(2*pi*time/period));
alpha_dot = -((pi/4)*2*pi/(period))*cos(2*pi*time/period);


Message("time:%f alpha:%f alpha_dot:%f x_velocity:%f y_velocity:%f\n",time,alpha,alpha_dot,x_velocity, y_velocity);


vel[0] = (x_velocity);
vel[1] = (y_velocity);
omega[2]= -(alpha_dot);

}
(whenever i click on build there is a msg i.e.
(chdir "libudf")(chdir "win64\2ddp") 'nmake' is not recognized as an internal or external command, operable program or batch file.)
after this if i load it gives the same error