# How can one experimentally measure the velocity of water flowing through a pipe?

I am planning to investigate the effect of bend curvature of a pipe on velocity of water. For this, I will need to find the velocity of water through various pipe bends. Would placing an object in the water such that the objects velocity can be measured and equated to the waters velocity do the trick?

• is it possible for you to interrupt the stream of water leaving the piping system experiment and catch it in a bucket? If so you can then time how long it takes to accumulate a gallon of water in the bucket- and then, knowing the pipe diameter, calculate how fast the water needs to flow through a pipe that size in order to achieve the gallons-per-minute rate you measured. Simple, foolproof, no instrumentation, cheap and accurate... – niels nielsen Dec 25 '18 at 8:17
• Bernoulli's equations should help. – QuIcKmAtHs Dec 25 '18 at 8:26
• Are you trying to measure the velocity variation over the cross section of the pipe, or just the average velocity? Water is basically incompressible, so, as long as the diameter is the same in the bends as in the straight sections, the average velocity will also be the same. The volumetric flow rate is not affected by the presence of the bends. – Chet Miller Dec 25 '18 at 13:15
• I am trying to measure the velocity variation over a cross section and analyse how the velocity varies when the water passes through various bends. – user217995 Dec 26 '18 at 6:54