Eddy velocity: 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">(''Also called'' fluctuation velocity.) The difference between the [[mean velocity]] of fluid flow and the instantaneous [[velocity]] at a point.</div><br/> <div class="paragraph">For example, <div class="display-formula"><blockquote>[[File:ams2001glos-Ee7.gif|link=|center|ams2001glos-Ee7]]</blockquote></div> where ''u'' is the [[eddy]] velocity, <div class="inline-formula">[[File:ams2001glos-Eex02.gif|link=|ams2001glos-Eex02]]</div> is instantaneous velocity, and ''U'' is mean velocity. Over the same interval that defines the mean velocity, the average value of the eddy velocity is necessarily zero.</div><br/> </div> | ||
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Latest revision as of 14:07, 20 February 2012
eddy velocity
(Also called fluctuation velocity.) The difference between the mean velocity of fluid flow and the instantaneous velocity at a point.
For example, where u is the eddy velocity, 
is instantaneous velocity, and U is mean velocity. Over the same interval that defines the mean velocity, the average value of the eddy velocity is necessarily zero.
