Large-eddy simulation of stably stratified atmospheric boundary layer turbulence: A scale-dependent dynamic modeling approach
By S. Basu, Fernando Port'e-Agel. 2005
170 citations recorded by the source corpus.
Abstract A new tuning-free subgrid-scale model, termed locally averaged scale-dependent dynamic (LASDD) model, is developed and implemented in large-eddy simulations (LES) of stable boundary layers. The new model dynamically computes the Smagorinsky coefficient and the subgrid-scale Prandtl number based on the local dynamics of the resolved velocity and temperature fields. Overall, the agreement between the statistics of the LES-generated turbulence and some well-established empirical formulations and theoretical predictions (e.g., the local scaling hypothesis) is remarkable. Moreover, the simulated statistics obtained with the LASDD model show relatively little resolution dependence for the range of grid sizes considered here. In essence, it is shown here that the new LASDD model is a robust subgrid-scale parameterization for reliable, tuning-free simulations of stable boundary layers, even with relatively coarse resolutions.
Subfields: Atmospheric Science, Computational Mechanics, Environmental Engineering
View Paper: https://www.semanticscholar.org/paper/f8dbdbd9a07b813c6f8492582c4d710983ce91ef
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Citations in the corpus
- Bridging the Transition from Mesoscale to Microscale Turbulence in Numerical Weather Prediction Models (2014, background): “The set of conditions used here is similar to previous LES studies of the SBL by Kosović and Curry (2000), Jiménez and Cuxart (2005) and Basu and Porté-Agel (2006).”