

The upper surface is made convex and the lower surface is made concave. Wings of Aeroplane Wings of an aeroplane are made tapering. Bernoulli’s principle is used in an atomiser and filter pump. It is used in a carburettor to mix air and petrol vapour in an internal combustion engine. Venturimeter, atomiser and filter pump Bernoulli’s principle is used in venturimeter to find the rate of flow of a liquid. Many people find this situation paradoxical when they first encounter it (higher velocity, lower pressure).

Bernoulli's law states that if a non-viscous fluid is flowing along a pipe of varying cross section, then the pressure is lower at constrictions where the velocity is higher, and the pressure is higher where the pipe opens out and the fluid stagnate.
