[mohit68]

I want to simulate pulsating flow in ansys fluent and I found a udf online. But I'm having trouble understanding a few functions in it.
Here's the code :
Face_t f;
Begin_f_loop (f,th)
Double t =( current_time*2- floor(current_time*2))/2;
{ If (t<=0.218)
F _profile (f,th,i)= 4*sin(4*pi*(t+0.0160236);
Else
F _profile (f,th,i)= 0;
}
All I need to know is what values does the current_time return.
How is t defined and what is the significance of 0.0160236 in the function.

[LuckyTran]

t is defined as such:

Double t =( current_time*2- floor(current_time*2))/2;

current time is not defined anywhere here. But presumably there is a line somewhere else declaring the shared variable, e.g.:

real current time;
current_time = CURRENT_TIME;

0.0160236 is a time-shift (i.e a phase shift). There could be a million reasons why such a phase shift was coded here, but it is a phase shift nonetheless.