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 in complex geometric configurations using boundary body forces
TL;DR: In this paper, the Navier-Stokes equations on orthogonal grids are applied independently of the grid by assigning body forces over surfaces that need not coincide with coordinate lines.
Journal ArticleDOI
2.5D large eddy simulation of vertical axis wind turbine in consideration of high angle of attack flow
TL;DR: In this paper, the feasibility and accuracy of three different CFD approaches, namely 2D URANS, 2.5D LES, and 2D large eddy simulations (LES), were investigated in the aerodynamic characterization of straight-bladed VAWT (SBVAWT), with a focus on the capability of the two.5d LES approach in CFD simulation of high angle of attack (AOA) flow.
Journal ArticleDOI
Database-analysis of errors in Large-Eddy Simulation
TL;DR: In this article, a database of decaying homogeneous, isotropic turbulence is constructed including reference direct numerical simulations at two different Reynolds numbers and a large number of corresponding large-eddy simulations at various subgrid resolutions.
Journal ArticleDOI
A dynamic subgrid-scale eddy viscosity model with a global model coefficient
TL;DR: In this article, a dynamic subgrid-scale eddy viscosity model is proposed for large eddy simulation of turbulent flows in complex geometry, and a dynamic procedure of determining the model coefficient is proposed based on the "global equilibrium" between the subgridscale dissipation and the viscous dissipation.
Journal ArticleDOI
On the role of the lift force in turbulence simulations of particle deposition
TL;DR: In this article, an "optimum" lift force was derived for a wall-bounded shear flow, which represents the most accurate description of the force acting on a particle.
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.
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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.