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Comparison of dynamic subgrid-scale models for simulations of neutrally buoyant sheer-driven atmosphereic boundary layer flows

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Anderson, WC and Basu, S and Letchford, CW (2007) Comparison of dynamic subgrid-scale models for simulations of neutrally buoyant sheer-driven atmosphereic boundary layer flows. Environmental Fluid Mechanics, 7 (3). pp. 195-215. ISSN 1573-1510

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Abstract

Several non-dynamic, scale-invariant, and scale-dependent dynamic subgridscale
(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.

Item Type: Article
Journal or Publication Title: Environmental Fluid Mechanics
Publisher: Springer
Page Range: pp. 195-215
ISSN: 1573-1510
Identification Number - DOI: 10.1007/s10652-007-9023-x
Additional Information:

The original publication is available at www.springerlink.com

Date Deposited: 07 Apr 2008 14:07
Last Modified: 18 Nov 2014 03:33
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