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
Dynamic subgrid scale modeling of turbulent flows using lattice-Boltzmann method
TL;DR: In this paper, the authors discuss the incorporation of dynamic subgrid scale (SGS) models in the lattice Boltzmann method (LBM) for large-eddy simulation (LES) of turbulent flows.
Dissertation
A physical-space version of the stretched-vortex subgrid-stress model for large-eddy simulation of incompressible flow
TL;DR: In this article, a relation between the resolved-scale velocity structure function of second order and the energy spectrum is derived based on the kinematics of the model vortex structures, and therefore without the assumption of isotropy.
Journal ArticleDOI
Sub-grid scale combustion models for large eddy simulation of unsteady premixed flame propagation around obstacles.
TL;DR: An assessment of different sub-grid scale (sgs) combustion models proposed for large eddy simulation (LES) of steady turbulent premixed combustion found that all sgs combustion models are able to reproduce qualitatively the experiment in terms of step of flame acceleration and deceleration around each obstacle, and shape of the propagating flame.
Journal ArticleDOI
Spectral-Dynamic Model for Large-Eddy Simulations of Turbulent Rotating Channel Flow
TL;DR: In this paper, a spectral-dynamic model is proposed for large eddy simulation of rotating and non-rotating turbulent plane channel flows, which is based on an adjustment of the turbulent eddy-viscosity coefficient to the deviation of the spectral slope with respect to the standard Kolmogorov law.
Journal ArticleDOI
A proper velocity scale for modeling subgrid-scale eddy viscosities in large eddy simulation
TL;DR: Hieriuti et al. as discussed by the authors proposed a new SGS model which mitigates the drawbacks of the commonly used Smagorinsky subgrid-scale (SGS) eddy viscosity model by utilizing the third-order terms in an anisotropic representation model of the Reynolds stresses.
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.