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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Performance of various sub-grid scale models in large-eddy simulations of turbulent flow over complex terrain
Satoru Iizuka,Hiroaki Kondo +1 more
TL;DR: In this paper, a large-eddy simulation of turbulent boundary layer over a steep hill was carried out using four different sub-grid scale (SGS) models and two different ground surface conditions.
Journal ArticleDOI
Effect of wall temperature in supersonic turbulent boundary layers: A numerical study
TL;DR: In this paper, a numerical study of statistical characteristics of spatially-evolving supersonic turbulent boundary layers (STBL) with cooled walls is performed to gain further insight into the role of wall temperature on the mean and fluctuating-flow properties of STBL.
Proceedings ArticleDOI
Large Eddy Simulation Using an Unstrcutured Mesh Based Finite-Volume Solver
TL;DR: In this article, a cell-centered scheme based on a multi-dimensional linear reconstruction scheme is proposed for a finite-volume solver which permits use of unstrcutured meshes.
Journal ArticleDOI
A Large-Eddy Simulation of the Near Wake of a Circular Cylinder
Stephen A. Jordan,Saad A. Ragab +1 more
TL;DR: In this article, the formation and downstream transport of the Strouhal vortices in the near wake of a circular cylinder are investigated using the large-eddy simulation (LES) method.
Journal ArticleDOI
Emergence of coherent flow structures over a gravel surface: A numerical experiment
TL;DR: In this paper, a large-eddy simulation (LES) is used to study the generation, evolution, and destruction of these flow structures over a naturally water-worked gravel surface, showing that there are two distinct scales of boundary influence upon the shallow flow and emphasize that the measured flow variability at any one point in a natural river will contain both locally derived and upstream-inherited flow structures, according to the range of scales of bed topography present.
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.