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
More filters
Journal ArticleDOI
Effects of trees on mean wind, turbulence and momentum exchange within and above a real urban environment
Marco Giometto,Andreas Christen,P. E. Egli,M. F. Schmid,Rory Tooke,Nicholas C. Coops,Marc B. Parlange +6 more
TL;DR: In this paper, large-eddy simulations are used to gain insight into the effects of trees on turbulence, aerodynamic parameters, and momentum transfer rates characterizing the atmosphere within and above a real urban canopy.
Journal ArticleDOI
Large eddy simulation of droplet dispersion for inhomogeneous turbulent wall flow
TL;DR: In this paper, a large eddy simulation coupled with a Lagrangian stochastic model has been applied to the study of droplet dispersion in a turbulent boundary layer, where the velocity of the fluid particle along the droplet trajectory is considered to have a large scale part and a small scale part given by a modified three-dimensional Langevin model using the filtered subgrid scale statistics.
Journal ArticleDOI
Turbulence Models in Pulsating Flows
Alberto Scotti,Ugo Piomelli +1 more
TL;DR: In this article, the performances of four low Reynolds-number models are compared for the unsteady Reynolds-average d Navier-Stokes equations applied to the flow in a channel driven by a pressure gradient oscillating around a nonzero mean.
Journal ArticleDOI
Large-Eddy Simulation of Shock/Boundary-Layer Interaction
TL;DR: In this paper, a large-eddy simulation is used to investigate unsteady mechanisms in supersonic flows, which reveal the existence of complex mechanisms, which need to be carefully investigated for efficient design of propulsion systems.
Journal ArticleDOI
Effects of modelling, resolution and anisotropy of subgrid-scales on large eddy simulations of channel flow
TL;DR: In this paper, the effect of subgrid-scale (SGS) modelling, grid resolution and anisotropy of the subgridscales on large eddy simulation (LES) is investigated.
References
More filters
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.