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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Synthetic turbulence, fractal interpolation, and large-eddy simulation
TL;DR: Developing a multiaffine fractal interpolation scheme that preserves not only the fractal dimension but also the higher-order structure functions and the non-Gaussian probability density function of the velocity increments is demonstrated.
Journal ArticleDOI
A novel geometry-adaptive Cartesian grid based immersed boundary–lattice Boltzmann method for fluid–structure interactions at moderate and high Reynolds numbers
TL;DR: A novel computational framework which combines the lattice Boltzmann method (LBM) and an improved immersed boundary method (IBM) based on a dynamic geometry-adaptive Cartesian grid system is introduced for the fluid–structure interaction (FSI) problems at moderate and high Reynolds numbers.
Journal ArticleDOI
Large eddy simulation and experimental measurements of the near-field of a large turbulent helium plume
TL;DR: In this article, large eddy simulations are conducted of a large, 1 m in diameter, turbulent helium plume, and the plume instability modes and flow dynamics are explored as a function of grid resolution with and without the use of subgrid scale models.
Journal ArticleDOI
Large eddy simulation of the effects of mild swirl on the near field of a round free jet
S. McIlwain,Andrew Pollard +1 more
TL;DR: In this paper, the authors modeled the near fields of turbulent round free jets with swirl numbers of S = 0.0 and 0.24 with large eddy simulations that use a dynamic Smagorinsky subgrid scale model.
Journal ArticleDOI
Large-Eddy Simulation of the Atmospheric Boundary Layer
TL;DR: The large-eddy simulation (LES) technique has developed into one of the most prominent numerical tools used to study transport processes in the atmospheric boundary layer (ABL) as discussed by the authors.
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.