Eddy velocity

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eddy velocity

(Also called fluctuation velocity.) The difference between the mean velocity of fluid flow and the instantaneous velocity at a point.

For example,
ams2001glos-Ee7
where u is the eddy velocity,
ams2001glos-Eex02
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.

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