[alinik]

Hi all,

I have a problem, I have written the following UDF to calculate and store y+ in a UDM. The problem is it returns zero.

Any ideas why?
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#include "udf.h"

DEFINE_ON_DEMAND(y_plus){

Domain *d;
real y_p;
face_t f;
cell_t c, c0;
Thread *t,*t0, *c_thread;
int Zone_ID=12; /* Zone ID of the wall on which y+ has to be calculated */

d=Get_Domain(ROOT_DOMAIN_ID);

/* Initialize the UDM value to zero in complete domain */

thread_loop_c(c_thread,d)
{
begin_c_loop(c, c_thread){
C_UDMI(c,c_thread,3)= 0;
}
end_c_loop(c, c_thread)
}

/* Calculate y+ and store them in UDM */

t=Lookup_Thread(d,Zone_ID);

begin_c_loop(c, t){

y_p = C_STORAGE_R(f,t, SV_WALL_YPLUS);

C_UDMI(c,t,3)= y_p;
}
end_c_loop(c, t)
}
/* *********************************************** */