Semiprime ring: Difference between revisions
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'''Eddy diffusion''', '''eddy dispersion''', '''multipath''', or [[turbulence|turbulent]] [[diffusion]] is any [[diffusion]] process by which substances are mixed in the [[atmosphere]] or in any fluid system due to [[eddy motion]].<ref>IUPAC Compendium of Chemical Terminology 2nd Edition (1997) [[Gold Book]] [http://www.iupac.org/goldbook/E01889.pdf Link]</ref><ref>Science world, wolframe</ref> In another definition<ref>Glossary of Meteorology [http://amsglossary.allenpress.com/glossary/browse?s=e&p=9 Link]</ref> it is mixing that is caused by [[eddy (fluid dynamics)|eddies]] that can vary in size from the small [[Kolmogorov microscales]] to subtropical [[gyre]]s. | |||
Because the microscopic processes responsible for atmospheric mixing are too complex to model in detail, atmospheric modelers generally treat atmospheric mixing as a macroscopic "eddy" diffusion process. In this approach, the diffusion rate at each pressure level is parameterized by a quantity known as the '''eddy diffusion coefficient''', K<ref>Chamberlain and Hunten 1987, pp. 75 and 90</ref> (also sometimes called '''eddy diffusivity''', with units of <math>m^2 s^{-1}</math>). | |||
==References== | |||
{{Reflist}} | |||
[[Category:Diffusion]] | |||
Latest revision as of 19:25, 11 October 2013
Eddy diffusion, eddy dispersion, multipath, or turbulent diffusion is any diffusion process by which substances are mixed in the atmosphere or in any fluid system due to eddy motion.[1][2] In another definition[3] it is mixing that is caused by eddies that can vary in size from the small Kolmogorov microscales to subtropical gyres.
Because the microscopic processes responsible for atmospheric mixing are too complex to model in detail, atmospheric modelers generally treat atmospheric mixing as a macroscopic "eddy" diffusion process. In this approach, the diffusion rate at each pressure level is parameterized by a quantity known as the eddy diffusion coefficient, K[4] (also sometimes called eddy diffusivity, with units of ).
References
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