[emmkell]

Hi All

Shown below is a UDF that I am using in order to turn on and off mass flow rate (to simulate inhalation). The UDF is interpreted by Ansys Fluent with no problems, but when i run the model, it is activating the flow after 1 second, but it is not switching it back off.

Would anyone have any idea why this is? Any help is greatly appreciated

#include "udf.h"

DEFINE_PROFILE(unsteady_mass_flow_rate, thread, position)
{

face_t f;
real t = CURRENT_TIME;
begin_f_loop(f, thread)
{
if (CURRENT_TIME <= 1)
F_PROFILE(f, thread, position) = 0;
else if (1 < t <= 2)
F_PROFILE(f, thread, position) = 0.00003;
else
F_PROFILE(f, thread, position) = 0;
}
end_f_loop(f, thread)
}