caa a22 4500 445874708 CHVBK 20180317145524.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s10652-010-9206-8 doi (NATIONALLICENCE)springer-10.1007/s10652-010-9206-8 A closure approach with multi-scale mixing length, and its application to wind and shear stress profiles within the atmospheric boundary layer [Elektronische Daten] [P. Misra, A. Luhar] A method to determine flow specific first-order closure for the turbulent flux of momentum in the atmospheric boundary layer (ABL) is presented. This is based on the premise that eddy viscosity is a flow rather than a fluid property, and the physically more realistic assumption that the transfer of momentum and other scalar quantities in a turbulent flow takes place by a large, but finite number of length scales, than the often used single length scale, the ‘mixing length'. The resulting eddy viscosity is flow specific and when applied to the study of the ABL, yields the vertical profiles of shear stress and mean wind velocity in good agreement with observations. The method may be extended to other types of turbulent flows, however it should be recognized that each type of flow may yield a different eddy viscosity profile. Using the derived eddy viscosity the paper presents simple analytical solutions of the ABL equations to determine observationally consistent wind speed and shear stress profiles in the ABL for a variety of practical applications including air pollution modelling. Springer Science+Business Media B.V., 2011 Atmospheric boundary layer nationallicence Eddy viscosity nationallicence Shear stress nationallicence Wind profiles nationallicence Stable atmospheric boundary layer nationallicence Mixing length nationallicence Misra P. Misra & Associates Inc., 1514 Ballantrae Dr., L5M3N3, Mississauga, ON, Canada aut Luhar A. CSIRO Marine and Atmospheric Research, PMB1, 3195, Aspendale, VIC, Australia aut Environmental Fluid Mechanics Springer Netherlands 11/5(2011-10-01), 481-498 1567-7419 11:5<481 2011 11 10652 https://doi.org/10.1007/s10652-010-9206-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10652-010-9206-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Misra P. Misra & Associates Inc., 1514 Ballantrae Dr., L5M3N3, Mississauga, ON, Canada aut NATIONALLICENCE 700 1- Luhar A. CSIRO Marine and Atmospheric Research, PMB1, 3195, Aspendale, VIC, Australia aut NATIONALLICENCE 773 0- Environmental Fluid Mechanics Springer Netherlands 11/5(2011-10-01), 481-498 1567-7419 11:5<481 2011 11 10652 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer