Bernoulli's law

American  

noun

1. a law of fluid mechanics describing the Bernoulli effect, expressed as P + 1/2 ρv² = constant, where P is pressure, ρ is the density of the fluid, and v is its velocity.

---

Bernoulli's law Scientific  

/ bər-no̅o̅′lēz /

1. A law of fluid mechanics stating the relationship between the velocity, density, and pressure of a fluid. Mathematically, the law states that P + 1/2 ρv ² = constant, where P is the pressure (in newtons per square meter), ρ is the density of the fluid (in kilograms per square meter), and v is the velocity (in meters per second). If no energy is added to the system, an increase in velocity is accompanied by a decrease in density and/or pressure. The law is directly related to the principle of conservation of energy.

2. See also Bernoulli effect

3. See law of large numbers

---

Example Sentences

"Knowledge of Bernoulli's law, the ideal gas law, and isothermal expansion are the three ingredients we baked into a model to explore how this device worked," Lipscombe said.

From Science Daily • Jan. 23, 2024

Stated simply, Bernoulli’s law says that the pressure of a fluid decreases as its velocity increases, and vice versa.

From Scientific American • Feb. 4, 2020

Most of Xenakis' ear-jarring music is an extension in sound of the calculus of probability, one of whose basic concepts is Bernoulli's law of large numbers.

From Time Magazine Archive