Dynamic pressure: Difference between revisions
From Glossary of Meteorology
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<div class="definition"><div class="short_definition">(''Also called'' velocity pressure, stagnation pressure.) In engineering fluid mechanics, the [[kinetic energy]], (1/2)ρ''V''<sup>2</sup>, of the fluid, where ρ is the [[density]] and ''V'' the speed.</div><br/> <div class="paragraph">This applies in cases where this quantity may be conveniently considered as adding to the [[static pressure]]; that is, the dynamic pressure at a given point is the difference between the static pressure at that point and the [[total pressure]] at the stagnation point of the same [[streamline]]. This concept must be distinguished from the [[hydrodynamic pressure]], and the terminology is confusing in meteorological contexts.</div><br/> </div> | <div class="definition"><div class="short_definition">(''Also called'' velocity pressure, stagnation pressure.) In engineering fluid mechanics, the [[kinetic energy]], (1/2)ρ''V''<sup>2</sup>, of the fluid, where ρ is the [[density]] and ''V'' the speed.</div><br/> <div class="paragraph">This applies in cases where this quantity may be conveniently considered as adding to the [[static pressure|static pressure]]; that is, the dynamic pressure at a given point is the difference between the static pressure at that point and the [[total pressure]] at the stagnation point of the same [[streamline]]. This concept must be distinguished from the [[hydrodynamic pressure]], and the terminology is confusing in meteorological contexts.</div><br/> </div> | ||
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Latest revision as of 15:51, 25 April 2012
dynamic pressure
(Also called velocity pressure, stagnation pressure.) In engineering fluid mechanics, the kinetic energy, (1/2)ρV2, of the fluid, where ρ is the density and V the speed.
This applies in cases where this quantity may be conveniently considered as adding to the static pressure; that is, the dynamic pressure at a given point is the difference between the static pressure at that point and the total pressure at the stagnation point of the same streamline. This concept must be distinguished from the hydrodynamic pressure, and the terminology is confusing in meteorological contexts.
