V = cv * (2gh) (1/2), velocity formula.

Among them:

V is the outlet speed, m/s.

Cv is the velocity coefficient (considering the head loss), and CV of the extended cylindrical nozzle is 0.82.

G is the local gravity acceleration, m/s 2.

H is the vertical distance from the centerline of the nozzle to the free surface of the container, m.