Journal ArticleDOI
A proposed modification of the Germano subgrid‐scale closure method
TLDR
In this paper, the subgrid-scale closure method developed by Germano et al. is modified by use of a least squares technique to minimize the difference between the closure assumption and the resolved stresses.Abstract:
The subgrid‐scale closure method developed by Germano et al. is modified by use of a least squares technique to minimize the difference between the closure assumption and the resolved stresses. This modification removes a source of singularity and is believed to improve the method’s applicability.read more
Citations
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Proceedings ArticleDOI
Trailing Edge Noise of a Controlled-Diffusion Airfoil at Moderate and High Angle of Attack
TL;DR: In this article, the authors study the flow and corresponding noise around a segment of an automotive blade (CD-airfoil) at design conditions, namely a 8-amber angle of attack, and a higher angle-of-attack of 15-amber, for which there is experimental evidence that the flow regime has significantly changed.
Journal ArticleDOI
Incremental unknowns, multilevel methods and the numerical simulation of turbulence
TL;DR: In this article, the authors describe the dynamic multilevel (DML) methodology applied to the numerical simulation of turbulent flows, which is based on a decomposition of the velocity field into small and large scale components; they give a slaving law of the small scales as a function of large scales.
Journal ArticleDOI
Trailing-Edge Noise Predictions Using Compressible Large-Eddy Simulation and Acoustic Analogy
William Wolf,Sanjiva K. Lele +1 more
TL;DR: In this paper, large-eddy simulations are conducted for a NACA0012 airfoil with rounded trailing edge for two flow configurations with different freestream Mach numbers (M1 � 0:115 and 0.4) for an angle of incidence of 5 deg.
Journal ArticleDOI
Subgrid-scale interactions in a numerically simulated planar turbulent jet and implications for modelling
TL;DR: In this paper, a dynamic two-component subgrid-scale model (DTM) is proposed to model the energy transfer in a planar turbulent jet at Reλ ≈ 110, obtained by direct numerical simulation.
Journal ArticleDOI
Unstrained and strained flamelets for LES of premixed combustion
TL;DR: In this paper, the performance of unstrained and strained flamelet closures for filtered reaction rate in large eddy simulation (LES) of premixed flames is studied, and the required subgrid scale (SGS) PDF in these closures is presumed using the Beta function.
References
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Journal ArticleDOI
General circulation experiments with the primitive equations
TL;DR: In this article, an extended period numerical integration of a baroclinic primitive equation model has been made for the simulation and the study of the dynamics of the atmosphere's general circulation, and the solution corresponding to external gravitational propagation is filtered by requiring the vertically integrated divergence to vanish identically.
Journal ArticleDOI
A dynamic subgrid‐scale eddy viscosity model
TL;DR: In this article, a new eddy viscosity model is presented which alleviates many of the drawbacks of the existing subgrid-scale stress models, such as the inability to represent correctly with a single universal constant different turbulent fields in rotating or sheared flows, near solid walls, or in transitional regimes.
Journal ArticleDOI
A numerical study of three-dimensional turbulent channel flow at large Reynolds numbers
TL;DR: In this article, the three-dimensional, primitive equations of motion have been integrated numerically in time for the case of turbulent, plane Poiseuille flow at very large Reynolds numbers.
Journal ArticleDOI
A dynamic subgrid‐scale model for compressible turbulence and scalar transport
TL;DR: Germano et al. as discussed by the authors generalized the dynamic subgrid-scale (SGS) model for the large eddy simulation (LES) of compressible flows and transport of a scalar.
On the application of the eddy viscosity concept in the Inertial sub-range of turbulence
TL;DR: In this paper, it was shown that an eddy diffusion hypothesis for use in numerical solutions of turbulent flow problems is consistent with the existence of an inertial subrange at the smallest resolvable scale of the numerical model.