[R.Velayati]

Hi All!
I'm Using UDF, PROFILE_DEFINE Macro for defining an inlet. my inlet is a 2D circle and that flow comes out of it and I have an equation for its mass flow rate:
mass flow rate = 5 sin(3.14*t/10)
that "t" is the physical time. I used below UDF Code:
#include "udf.h"
#define PI 3.14159265
DEFINE_PROFILE(inlet_mass_Flow_rate,th,i)
{
face_t f;
double x;
x = RP_Get_Real("flow-time");
begin_f_loop(f,th)
{
F_PROFILE(f,th,i) = 0.5* sin(x*PI/10);
}
end_f_loop(f,th);
}
but I recieved floating point error. anybody has any advice?

[AlexanderZ]

try

#include "udf.h"

DEFINE_PROFILE(inlet_mass_Flow_rate,th,i)
{
face_t f;
real x;
x = RP_Get_Real("flow-time");
begin_f_loop(f,th)
{
F_PROFILE(f,th,i) = 0.5* sin(x*M_PI/10);
}
end_f_loop(f,th);
}

best regards