Spectral diffusivity

From Glossary of Meteorology



spectral diffusivity

A form of eddy viscosity or eddy diffusivity that varies with eddy size.

For a spectrum of turbulent eddy sizes there is a spectrum of diffusivities. By integrating over all eddy sizes and diffusivities, the total effect of turbulence can be approximated. This is a form of nonlocal turbulence closure and can be shown to be related to transilient turbulence theory.


Retrieved from "https://glossarystaging.ametsoc.net/w/index.php?title=Spectral_diffusivity&oldid=5661"
Powered by MediaWiki
Powered by WikiTeq
Powered by Semantic MediaWiki
Copyright 2024 American Meteorological Society (AMS). For permission to reuse any portion of this work, please contact permissions@ametsoc.org. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S.Copyright Act (17 USC § 108) does not require AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, require written permission or a license from AMS. Additional details are provided in the AMS Copyright Policy statement.