# Bernoulli’s Equation and Formula

## What is Bernoulli’s Equation?

Bernoulli’s equation formula is a mathematical relationship between pressure, speed, and height at two separate points within a closed conduit. The equation works under the five following assumptions

1) The fluid flowing through the conduit is ideal or perfect.

2) Viscosity of the fluid is determined to be zero.

3) The flow is steady.

4) There is no energy loss during flow.

5) The fluid is flowing in a closed conduit.

In the above formula, the variables are defined as follows:

**H _{1}** – Fluid height at point 1 (meters or feet)

**P**– Fluid pressure at point 1 (Pa or Hg)

_{1}**V**– Fluid flow rate at point 1 (m/s or ft/s)

_{1}**H**– Fluid pressure at point 1 (meters or feet)

_{2}**P**– Fluid pressure at point 1 (Pa or Hg)

_{2}**V**– Fluid pressure at point 1 (m/s or ft/s)

_{2}**ρ**– Fluid density (kg/m

^{3}or Slugs/ft

^{3})

**g**– Fluid pressure at point 1 (m/s

^{2}or ft/s

^{2})