[Seven7]

Hi everyone,

I'm looking for a water tap to attach on a mass flow inlet of a multiphase simulation (No air from the tap). I'm not familliar with UDF programming (this one would be my first one).

I have found an example as basic:


#include "udf.h"

DEFINE_PROFILE(inlet_mf,th,i)
{
face_t f;
begin_f_loop(f,th)
{

if(CURRENT_TIME <= 10.0)
F_PROFILE(f,th,i) = 14.0;
else if(CURRENT_TIME <=10.0 && CURRENT_TIME >40.0)
F_PROFILE(f,th,i) = xxx.0;
else
F_PROFILE(f,th,i) = 2100.0;
}
end_f_loop(f,th);
}


by the xxx in the UDF I would like to open the tap linear, like in the attached picture.

is this easyer to do with Enter the Expressions Directly into the Fluent UI or ist this a typical UDF task?

Seven7

[AlexanderZ]

for this statement

else if(CURRENT_TIME <=10.0 && CURRENT_TIME >40.0)
F_PROFILE(f,th,i) = xxx;

instead of xxx you need linear equation
y= kx + b
where you need to find k and b , but y = 14 if x = 10 sec and y = 2100 if x = 40 sec