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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Journal ArticleDOI
Comparative study of the propagation of methane/air and hydrogen/air flames in a duct using large eddy simulation
TL;DR: In this paper, the propagation of methane/air and hydrogen/air explosion flames in four closed ducts with different aspect ratios was numerically investigated using large eddy simulation (LES).
Journal ArticleDOI
Influence of chemical schemes, numerical method and dynamic turbulent combustion modeling on LES of premixed turbulent flames
Bastien Rochette,Félix Collin-Bastiani,Laurent Gicquel,Olivier Vermorel,Denis Veynante,Thierry Poinsot +5 more
TL;DR: In this paper, a large eddy simulation of a turbulent premixed flame (the VOLVO rig) comparing Analytically Reduced Chemistry (ARC) with globally reduced chemistry for propane-air combustion, a dynamic Thickened Flame (TFLES) model with the usual non-dynamic TFLES model and a high-order Taylor Galerkin numerical scheme with a low-order Lax-Wendroff scheme is presented.
Journal ArticleDOI
Simulation of Turbulent Flow in a Ribbed Pipe Using Large Eddy Simulation
Sowjanya Vijiapurapu,Jie Cui +1 more
TL;DR: In this article, the spacing between the ribs is varied to form three representative surface roughness: d-type, intermediate, and k-type; the numerical results are validated against experimental measurements and other numerical data published in the literature.
Journal ArticleDOI
On the Application of the Dynamic Smagorinsky Model to Large-Eddy Simulations of the Cloud-Topped Atmospheric Boundary Layer
TL;DR: In this paper, the dynamic Smagorinsky model is adapted for simulations of the cloud-topped atmospheric boundary layer in which an anelastic form of the governing equations is used.
Journal ArticleDOI
Filtered subgrid-scale models
TL;DR: In this paper, a high-pass discrete test filter is proposed for a subgrid-scale model with high-frequency modes, and some a posteriori tests on the incompressible channel flow case are presented.
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.
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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.
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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.