# Bernoulli’s Equation (conservation of energy)

## Description

Bernoulli’s equation states that for an incompressible, frictionless fluid, the above mentioned sum is constant. If we follow a small volume of fluid along its path, various quantities in the sum may change, but the total remains constant.

Related formulas## Variables

P_{1} | Absolute pressure at point 1 (N/m^{2}) |

ρ | Fluid density (kg/m^{3}) |

v_{1} | Velocity of the fluid at point 1 (fluid flow speed) (m/s) |

g | Standard gravity |

h_{1} | Height of point 1 above some reference point (m) |

P_{2} | Absolute pressure at point 2 (N/m^{2}) |

v_{2} | Velocity of the fluid at point 2 (fluid flow speed) (m/s) |

h_{2} | Height of point 2 above some reference point (m) |