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Equations of turbulent diffusion in shear flows
Author(s) -
Kao S. K.
Publication year - 1975
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl002i007p00297
Subject(s) - eddy diffusion , turbulent diffusion , turbulence , mechanics , shear (geology) , shear flow , shear velocity , thermal diffusivity , diffusion , cauchy stress tensor , turbulence modeling , shear stress , geology , physics , classical mechanics , thermodynamics , petrology
An analysis of the characteristics of the eddy diffusivity is made, and the equations for turbulent diffusion in shear flows are derived. It is shown that the coefficients of the eddy diffusion can be expressed in terms of the stress tensor of the turbulent motion, a characteristic time and the velocity shear of the mean flow, which can be readily determined.