[Yong666]

Dear all, I'm new in Fluent and have little knowledge on udf and programming. I want to define heat fluxes on two parallel boudaries (like two parallel sides of a rectangle). The local heat fluxes are dependent on the corresponding local tempearatures of these boundaries. I came up with a udf as following:


#include "udf.h"
DEFINE_PROFILE(mfee, t, i)
{
face_t f;
Domain *d;
d=Get_Domain(1);
int ID = 4; /* id number of the other boundary zone */
Thread *thread1=Lookup_Thread(d,4);
begin_f_loop(f, t)
{
real t1=F_T(f, t);
real t2=F_T(f, thread1);
F_PROFILE(f,t,i)=-(exp(23.238-((3841/(t1-45))))-exp(23.238-((3841/(t2 - 45)))));
}
end_f_loop(f, t)
}

I'm using the same face index for both threads. I really don't know how the face index is stored (following certain direction? say x direction).

Please suggest any errors. Appreciate!