Question

Sketch the velocity distributions at the throat section (of diameter 2cm) and at the inlet of the venturimeter (of diameter 4cm).

Answer 1

cross section area of the throat a_t = 1² =

cross section area of the inlet a_in = *2² = 4

v_i and v_t are the velocities at the inlet and throat

( volume of the fluid incoming = volume of fluid out going, when there are no sinks or no sources. There are no sources or sinks between the inlet and the throat)

using continuity eq. a_in * v_i = a_t *v_t  

v_t = 4 v_i