Exchange Coefficients
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Exchange Coefficients
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Coefficients of eddy flux (e.g., of momentum, heat, water vapor, etc.) in
turbulent
flow, defined in analogy to those of the kinetic theory of gases (see eddy). Also called
austausch coefficients, eddy coefficients, interchange coefficients.
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The exchange-coefficient hypothesis states that the mean eddy flux per
unit area of a conservative quantity (suitability expressed) is proportional
to the gradient of the mean value of this quantity, that is,
coefficient; E is the mean value of the quantity; and N is the direction normal to the surface. In strict analogy to molecular properties; C_{e} would be constant, for turbulent flow C_{e} turns out to depend on time and location. See eddy viscosity diffusivity. [[/a>|/a> ]]
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use