What defines a 'Venturi' in the context of fluid dynamics?

A 'Venturi' in the context of fluid dynamics is defined by its ability to create pressure variations due to a restriction in the flow area. This principle is fundamental in fluid mechanics, where the Venturi effect describes how fluid speed increases as it passes through a constricted section of a pipe, leading to a decrease in pressure according to Bernoulli's principle.

This means that as the fluid flows through the narrower section (the Venturi), its velocity increases while its pressure decreases. This concept is commonly employed in various applications, such as carburetors in engines and flow meters, to measure the flow rate of liquids and gases.

While mixing fluids and measuring fluid velocity are important aspects of fluid dynamics, they do not specifically characterize a 'Venturi' as effectively as the pressure variation caused by a restriction does. Additionally, a pump is an entirely different mechanism used for moving liquids and does not pertain directly to the principle behind the Venturi effect.