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
Large-eddy simulation of turbulent mixing layers
Amid Ansari,William Z. Strang +1 more
TL;DR: In this article, large eddy simulations of turbulent mixing layers starting from a laminar profile have been performed using an incompressible psuedo-spectral code and a compressible finite-volume code.
Journal ArticleDOI
Dynamic testing of subgrid models in large eddy simulation based on the Germano identity
Charles Meneveau,Joseph Katz +1 more
TL;DR: In this article, Liu et al. used the Germano identity in large eddy simulation (LES) of turbulent flows to evaluate model coefficients so as to minimize the square error associated with replacing a particular model in the identity.
Journal ArticleDOI
Assessment of subgrid-scale models with a large-eddy simulation-dedicated experimental database: The pulsatile impinging jet in turbulent cross-flow
TL;DR: In this paper, a pulsatile hot-jet impinging a flat-plate in the presence of a cold turbulent cross-flow is reported, which involves different flow features encountered in complex configurations: shear/rotating regions, stagnation point, wall-turbulence and the propagation of a vortex ring along the wall.
Journal ArticleDOI
Variational formulation of the Germano identity for the Navier Stokes equations
Assad A. Oberai,John Wanderer +1 more
TL;DR: In this paper, the variational counterpart of the Germano identity for the large eddy simulation (LES) of turbulent flows is derived, and the performance of this identity in predicting the Smagorinsky eddy viscosity during the decay of homogeneous isotropic turbulence is evaluated.
Journal ArticleDOI
Large‐eddy simulation of compressible flows using a spectral multidomain method
TL;DR: In this paper, a high-order, multidomain-based large-eddy simulation (LES) methodology for compressible flows is presented, where the LES model equations are approximated on unstructured grids of non-overlapping hexahedral sub-domains providing geometric flexibility.
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.