Question

What is the term for the pressure that creates water flow between two points?

Answer 1

Bernoulli's principle in fluid dynamics gives the pressure that creates water flow between two points.

Bernoulli's principle can be derived from the principle of conservation of energy.

Consider a stream line of steady flow of an ideal fluid along a stream tube at points A and B.

Apply Bernoulli's principle at A and B,

PB VB PA VA + pg 29 + ZA + + 2B P9 29

Pressure difference between two points:

$\frac{P_{A}-P_{B}}{\rho g}=(\frac{V_{B}^{2}-V_{A}^{2}}{2g})+(Z_{B}-Z_{A})$