Applying Bernoulli's Principle

Bernoulli's Principle.

(Bernoulli's principle story)

1) Bernoulli's Principle states that the pressure of a fluid (liquid or gas) decreases at the region where the speed of fluid flow increases.

Relationship between speed of fluid flow and cross-sectional area.

Volume of fluid                       = A1v1

entering per second

Volume of fluid                       = A2v2

leaving per second              

The fluid is incompressible, so

A2v2 = A1v1

v2 = A1

v1    A2

2) To increase the kinetic energy, force is required to do work while flowing through the narrow section of the pipe.