[heng94]

Hello all. I am new to UDF on fluent. I need to specify a wall (z direction) temperature boundary condition: T(z) = 10.+(30.*(y/1000)) where 30°C/km. Where y (m) is the distance of the point from the top of the geometry which is 3.4km long.

The code i have so far is as below. When i try change real y to z, error occurs. Can someone help me with the UDF coding? Thank you very much


#include "udf.h"
DEFINE_PROFILE(wall_temp,thread,index)
{
real x[ND_ND];
real y;
face_t f;
begin_f_loop(f,thread)
in the DEFINE macro argument */
{
F_CENTROID(x,f,thread);
y = x[1];
F_PROFILE(f,thread,index) = 10.+(30.*(y/1000);
}
end_f_loop(f,thread)
}