Bernoulli's principle

From GAWDAwiki

Bernoulli's principle is a principle of fluid dynamics. It states that as the speed of a moving fluid increases, the pressure within the fluid decreases. The fluid can be a liquid or a gas. For the principle to apply, the following is assumed:

• fluid or gas flows smoothly
• fluid or gas flows without any swirls or "eddies"
• fluid or gas flows everywhere throughout the pipe
• fluid or gas has the same density everywhere

As a fluid or gas flows through a pipe that narrows or widens, the velocity and pressure will vary. The fluid or gas will flow more quickly through the narrow sections, but the pressure will decrease.^[1]

References

1. http://www.medicalgasinfo.com/content/definitions.htm