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Study of Near-Surface Models in Large-Eddy Simulations of a Neutrally Stratified Atmospheric Boundary LayerLarge-eddy simulation (LES) is a widely used technique in armospheric modeling research. In LES, large, unsteady, three dimensional structures are resolved and small structures that are not resolved on the computational grid are modeled. A filtering operation is applied to distinguish between resolved and unresolved scales. We present two near-surface models that have found use in atmospheric modeling. We also suggest a simpler eddy viscosity model that adopts Prandtl's mixing length model (Prandtl 1925) in the vicinity of the surface and blends with the dynamic Smagotinsky model (Germano et al, 1991) away from the surface. We evaluate the performance of these surface models by simulating a neutraly stratified atmospheric boundary layer.
Document ID
Document Type
Senocak, I.
(Stanford Univ. Stanford, CA, United States)
Ackerman, A. S.
(NASA Ames Research Center Moffett Field, CA, United States)
Kirkpatrick, M. P.
(Tasmania Univ. Hobart, Australia)
Stevens, D. E.
(Lawrence Livermore National Lab. Livermore, CA, United States)
Mansour, N. N.
(Stanford Univ. Stanford, CA, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2004
Publication Information
Publication: Annual Research Briefs, 2004: Center for Turbulence Research
Subject Category
Meteorology And Climatology
Distribution Limits
Work of the US Gov. Public Use Permitted.

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