%0 Journal Article
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%3 Prakki.pdf
%X A turbulent subfilter viscosity for large eddy simulation (LES) models is proposed, based on Heisenberg's mechanism of energy transfer. Such viscosity is described in terms of a cutoff wave number, leading to relationships for the grid mesh spacing, for a convective boundary layer (CBL). The limiting wave number represents a sharp filter separating large and small scales of a turbulent flow and, henceforth, Heisenberg's model agrees with the physical foundation of LES models. The comparison between Heisenberg's turbulent viscosity and the classical ones, based on Smagorinsky's parameterization, shows that both procedures lead to similar subgrid exchange coefficients. With this result, the turbulence resolution length scale and the vertical mesh spacing are expressed only in terms of the longitudinal mesh spacing. Through the employment of spectral observational data in the CBL, the mesh spacings, the filter width and the subfilter eddy viscosity are described in terms of the CBL height. The present development shows that Heisenberg's theory naturally establishes a physical criterium that connects the subgrid terms to the large-scale dimensions of the system. The proposed constrain is tested employing a LES code and the results show that it leads to a good representation of the boundary layer variables, without an excessive refinement of the grid mesh. (c) 2007 Elsevier Ltd. All rights reserved.
%8 Oct.
%N 33
%@secondarydate 200710
%T Employing Heisenberg's turbulent spectral transfer theory to parameterize sub-filter scales in LES models
%@secondarytype PRE PI
%K flows, Heisenberg model, convective boundary layer.
%@visibility shown
%@group
%@group DOP-INPE-MCT-BR
%@group DMD-INPE-MCT-BR
%@group
%@group LAC-INPE-MCT-BR
%@e-mailaddress deicy@cptec.inpe.br
%@secondarykey INPE-15271-PRE/10088
%@copyholder SID/SCD
%@issn 1352-2310
%2 sid.inpe.br/mtc-m17@80/2007/12.17.17.08.28
%@affiliation Departamento de Fý´sica, Universidade Federal de Santa Maria, Santa Maria, RS
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE/CPTEC)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE/CPTEC)
%@affiliation Departamento de Fý´sica, Universidade Federal de Santa Maria, Santa Maria, RS
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Ist Sci Atmosfera & Clima, Lecce, Italy
%@affiliation Faculdade de Meteorologia, Universidade Federal de Pelotas, Pelotas
%B Atmospheric Environment
%P 7059-7068
%4 sid.inpe.br/mtc-m17@80/2007/12.17.17.08
%D 2007
%V 41
%A Degrazia, Gervasio A.,
%A Nunes, André Becker,
%A Prakki, Satyamurty,
%A Acevedo, Otavio C.,
%A Velho, Haroldo F. de Campos,
%A Rizza, Umberto,
%A Carvalho, Jonas C.,
%@dissemination WEBSCI; PORTALCAPES.
%@area MET