What is Venturimeter used for ?
Venturimeter is an instrument used to measure the flow rate of fluids in general, which is open at both ends and narrows at both ends towards the middle of the section. It was first used by Italian physicist Giovanni Battista Venturi in 1797. Therefore, the device is called venturimeter.
As the fluid moving in a venturi passes through the venturi constriction zone, its velocity increases, and due to this increase, reverse pressure occurs in this zone. This reverse pressure created creates a vacuum effect in the contraction zone without spending extra energy and causes liquid - gas transfer.