Pressure force: Difference between revisions
From Glossary of Meteorology
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<div class="definition"><div class="short_definition">( | <div class="definition"><div class="short_definition">(''Or'' pressure-gradient force.) The force due to differences of [[pressure]] within a fluid mass.</div><br/> <div class="paragraph">The ([[vector]]) force per unit volume is equal to the [[pressure gradient]], -'''∇'''''p'', and the force per unit mass ([[specific]] force) is equal to the product of the volume force and the [[specific volume]], -α'''∇'''''p''. In the [[atmosphere]], the vertical component of this force is of the order of 10<sup>4</sup> times the horizontal component; in meteorological literature the term "pressure force" usually refers only to the latter [[horizontal pressure force]].</div><br/> </div> | ||
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Latest revision as of 15:54, 20 February 2012
pressure force
(Or pressure-gradient force.) The force due to differences of pressure within a fluid mass.
The (vector) force per unit volume is equal to the pressure gradient, -∇p, and the force per unit mass (specific force) is equal to the product of the volume force and the specific volume, -α∇p. In the atmosphere, the vertical component of this force is of the order of 104 times the horizontal component; in meteorological literature the term "pressure force" usually refers only to the latter horizontal pressure force.