Question

Help with fluids please!
A 1.5 cm -diameter venturi flowmeter is inserted in a 2.5 cm -diameter pipe carrying water (density =1000 kg/m3). The pressure difference between venturi and unconstricted pipe is 15 kPa.
Find the flow speed in the pipe. Find the volume flow rate.

Answer 1

Using Bernoulli's Eqn??

you have a stagnation point at the tip of the pitot, ie v = 0, so Bernoulli becomes

\(P_1 + \frac{1}{2} \rho v_1^2 = P_2 \)

and you can get v from that

for the vol flow rate you have \(\dot V = v . A\), where A is cross sect area

make sense?