[Mosheraa]

I'm fairly new to Fluent, and as part of teaching myself the UDF structure I made a small UDF to read area and flow at the boundary.

However, when I printed the data to the screen it gave me nothing but nonsense values. Also, when I directly printed the "M_PI" function, the output was somewhere above 1.6 trillion.

Has anyone encountered similar problems, or have any thoughts about what might be going wrong?

For reference, here is the small UDF I wrote. I applied it as a pressure outlet boundary condition for laminar flow in an axi-symmetric pipe.

/************************************************** **************************************
Test function to debug Fluent/UDF operations
************************************************** **************************************/

#include "udf.h"


/*Test Axisymmetric Floow and Area*/


DEFINE_PROFILE( area_test, t, i )
{
/*Variables*/

real r = 0;
real ri[ND_ND];
real q = 0;

face_t f;


/*Loop Over Faces*/

begin_f_loop( f, t )
{
q += 2*M_PI*F_FLUX( f, t );

F_AREA(ri,f,t);
r += NV_MAG(ri);

F_PROFILE(f,t,i) = 0;

printf( "Inside Loop area: %d\n", F_AREA(ri,f,t) );
printf( "INside LOop flux: %d\n", F_FLUX(f,t) );
}
end_f_loop( f, t )


/*Print out data*/

printf( "Outlet Area is: %d\n", r );
printf( "Outlet flow is: %d\n", q );
printf( "Fluent thinks pi is %d\n", M_PI);
}