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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Large-eddy simulation of flow over an axisymmetric body of revolution
Praveen Kumar,Krishnan Mahesh +1 more
TL;DR: In this paper, a wall-resolved large-eddy simulation (LES) is used to simulate flow over an axisymmetric body of revolution at a Reynolds number, equilibrium self-similar solutions, which were only observed for wake of bluff bodies in the past.
Journal ArticleDOI
Large Eddy Simulation of a Planar Jet Flow with Nanoparticle Coagulation
TL;DR: In this paper, a planar planar jet is modeled using large eddy simulation and the particle field is obtained by employing a moment method to approximate the nanoparticle general dynamic equation.
Journal ArticleDOI
Experimental Investigation and Large-Eddy Simulation of the Turbulent Flow past a Smooth and Rigid Hemisphere
TL;DR: In this article, a detailed experimental and numerical investigation on the turbulent flow past a hemispherical obstacle (diameter D) is provided, where the bluff body is exposed to a thick turbulent boundary layer of the thickness δ = D/2 at Re = 50,000.
Journal ArticleDOI
Nonpremixed and premixed flamelets LES of partially premixed spray flames using a two-phase transport equation of progress variable
Yong Hu,Ryoichi Kurose +1 more
TL;DR: In this article, partially premixed spray flames are simulated with flamelet-based tabulated chemistry parameterized by the mixture fraction and progress variable, and their validities in spray flames and dependence on the evaporation effect when considering two-phase C equation are examined.
Journal ArticleDOI
Effect of Incoming Turbulent Structure on Pollutant Removal from Two-Dimensional Street Canyon
Takenobu Michioka,Ayumu Sato +1 more
TL;DR: In this paper, large-eddy simulations are conducted to investigate the effects of the incoming turbulent structure of the flow on pollutant removal from an ideal canyon, where three turbulent flows upwind of the street canyon are generated by using different block configurations, and a tracer gas is released as a ground-level line source at the centre of the canyon floor.
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.
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.