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Comparison of dynamic subgrid-scale models for simulations of neutrally buoyant shear-driven atmospheric boundary layer flows

Citation

Anderson, WC and Basu, S and Letchford, CW, Comparison of dynamic subgrid-scale models for simulations of neutrally buoyant shear-driven atmospheric boundary layer flows, Environmental Fluid Mechanics , 7, (3) pp. 195-215. ISSN 1567-7419 (2007) [Refereed Article]

DOI: doi:10.1007/s10652-007-9023-x

Abstract

Several non-dynamic, scale-invariant, and scale-dependent dynamic subgrid-scale (SGS) models are utilized in large-eddy simulations of shear-driven neutral atmospheric boundary layer (ABL) flows. The popular Smagorinsky closure and an alternative closure based on Kolmogorov's scaling hypothesis are used as SGS base models. Our results show that, in the context of neutral ABL regime, the dynamic modeling approach is extremely useful, and reproduces several establised results (e.g., the surface layer similarity theory) with fidelity. The scale-dependence framework, in general, improves the near-surface statistics from the Smagorinsky model-based simulations. We also note that the local averaging-based dynamic SGS models perform significantly better than their planar averaging-based counterparts. Lastly, we find more or less consistent superiority of the Smagorinsky-based SGS models (over the corresponding Kolmogorov's scaling hypothesis-based SGS models) for predicting the inertial range scaling of spectra. © Springer Science+Business Media B.V. 2007.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Atmospheric Sciences
Research Field:Atmospheric Sciences not elsewhere classified
Objective Division:Environment
Objective Group:Atmosphere and Weather
Objective Field:Weather
Author:Letchford, CW (Professor Chris Letchford)
ID Code:50815
Year Published:2007
Web of Science® Times Cited:13
Deposited By:Engineering
Deposited On:2007-08-01
Last Modified:2012-03-01
Downloads:0

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