Dear Fluent User, Could you please help me to write a UDF for the following boundary condition: Heat flux at some wall= aT^2 where T is temperature and a is constant. Many thanks

[milton.tafadzwa]

You can try this. My computer does not have both c and fluent software so did not test it.
#include "udf.h"
#define A (value of a)
DEFINE_PROFILE(heat_flux, c, t)
{
cell_t c;
real x[ND_ND];
real T = C_T(c, t);

begin_c_loop (c,t)
{
C_CENTROID(x,c,t);
y =x[1];
F_PROFILE(c,t,i) =A*T*T;
}
end_c_loop (c,t)
}