[Eunikki]

Hello everyone,
I'm trying to create a velocity profile for a cylinder's wall that is treated as velocity inlet. What I'd like to do is to restrict the area (by height) in order to make a profile that is better suited for my case. (3D simulation)


For instance this is the part that is used for axial velocity at the moment, but it doesn't differ from the normal velocity profile without the UDF:

DEFINE_PROFILE(vA_liq,thread,i)
{
face_t f;
float x[ND_ND];
float zpos;

begin_f_loop(f,thread)
{
F_CENTROID(x,f,thread);
zpos=x[2];
if (zpos<=-0.66316 && zpos>=-1.65) // GIVE THE EXACT Z-AXIAL IN m
F_PROFILE(f,thread,i)=-1.15;
else
F_PROFILE(f,thread,i) = 0;
}
end_f_loop(f,thread)

How can I get it to restrict the area used for velocity inlet by setting the restraint on z-axis values?

Thank you in advance.