Total pressure

From Wikipedia, the free encyclopedia

In physics, the term total pressure may indicate two different quantities, both having the dimensions of a pressure:

In fluid dynamics, total pressure ( $p_{0}$ ) refers to the sum of static pressure p, dynamic pressure q, and gravitational head, as expressed by Bernoulli's principle:

$p_{0}=p+q+\rho gz\,$

where ρ is the density of the fluid, g is the local acceleration due to gravity, and z is the height above a datum.

If the variation in height above the datum is zero, or so small it can be ignored, the above equation reduces to the following simplified form:

$p_{0}=p+q\,$

In a mixture of ideal gases, total pressure refers to the sum of each gas' partial pressure.

This article is issued from Wikipedia. The text is available under the Creative Commons Attribution/Share Alike; additional terms may apply for the media files.