Open Access
Improved Subgrid-scale Models for Large-Eddy Simulation
TLDR
In this article, the authors analyzed models for subgrid-scale turbulence and showed that the kinetic energy of small-scale motions can be decomposed into two parts: one results from the large scales and is correlated with them, and the other part is uncorrelated which leads to a two-component eddy-viscosity model.Abstract:
The paper analyzes models for subgrid-scale turbulence. The analysis indicates that there is sufficient information in the resolved scales to determine some characteristics of the complete flow field. The kinetic energy of the small-scale motions can be decomposed into two parts: one results from the large scales and is correlated with them, and the other part is uncorrelated which leads to a two-component eddy-viscosity model. The 'production equals dissipation' argument does not apply to the small scales in the decay of turbulence because it does not account for the uncorrelated component. The exchange between the large and small scales takes place mainly between the smallest scales of the former and the largest scales of the latter; this argument is the basis of a new model shown to be superior to the Smagorinsky model (1963).read more
Citations
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Scale-Invariance and Turbulence Models for Large-Eddy Simulation
Charles Meneveau,Joseph Katz +1 more
TL;DR: In this article, a review of scale-invariance properties of high-Reynolds-number turbulence in the inertial range is presented, focusing on dynamic and similarity subgrid models and evaluating how well these models reproduce the true impact of the small scales on large scale physics and how they perform in numerical simulations.
Journal ArticleDOI
A Lagrangian dynamic subgrid-scale model of turbulence
TL;DR: In this paper, the Smagorinsky eddy-viscosity model is combined with a spatially averaged dynamic model for complex-geometry inhomogeneous flows, and a new dynamic model formulation is introduced that combines advantages of the statistical and local approaches.
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Dynamics and stability of lean-premixed swirl-stabilized combustion
Ying Huang,Vigor Yang +1 more
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A review on regional convection-permitting climate modeling: Demonstrations, prospects, and challenges.
Andreas F. Prein,Andreas F. Prein,Wolfgang Langhans,Giorgia Fosser,Andrew Ferrone,Nikolina Ban,Klaus Goergen,Michael Keller,Merja Tölle,Oliver Gutjahr,Frauke Feser,Erwan Brisson,Stefan Kollet,Juerg Schmidli,Nicole Van Lipzig,Ruby Leung +15 more
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On the properties of similarity subgrid-scale models as deduced from measurements in a turbulent jet
TL;DR: In this paper, the properties of turbulence subgrid-scale stresses are studied using experimental data in the far field of a round jet, at a Reynolds number of Rλ ≈ 310.
References
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