Nonlocal Treatment of the Buoyancy-Shear-Driven Boundary Layer | Zendy

Enrico Ferrero | Zendy; Nicola Colonna | Zendy

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Nonlocal Treatment of the Buoyancy-Shear-Driven Boundary Layer

Author(s) -

Enrico Ferrero,

Nicola Colonna

Publication year - 2006

Publication title -

journal of the atmospheric sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.853

H-Index - 173

eISSN - 1520-0469

pISSN - 0022-4928

DOI - 10.1175/jas3789.1

Subject(s) - buoyancy , convective boundary layer , parameterized complexity , turbulence , mechanics , boundary layer , convection , physics , large eddy simulation , meteorology , planetary boundary layer , geology , classical mechanics , mathematics , combinatorics

A successful description of a convective boundary layer requires that the model employed takes into account the nonlocal nature of turbulent convection. In this paper new third-order moments (TOMs) are presented and tested. Numerical solutions are obtained using mean flow components and second-order moments as input. The problem of the turbulent damping of the TOMs is considered. The terms in the dynamic equations responsible for the unphysical growth of the TOMs are parameterized, taking into account their dependence on the integral length scale vertical profile. The calculated profiles are presented and tested against large-eddy simulation data and aircraft measurements. In both cases the results compare favorably.

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