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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Modeling turbulent flow over fractal trees with renormalized numerical simulation
TL;DR: In this article, a new numerical modeling technique called renormalized numerical simulation (RNS) is introduced to address this fundamental difficulty and avoid the need to resolve all the small-scale branches of the fractal.
Journal ArticleDOI
Fully conservative finite difference scheme in cylindrical coordinates for incompressible flow simulations
TL;DR: In this article, a finite difference scheme on a non-uniform staggered grid in cylindrical coordinates is proposed for incompressible flow with the exception of the time marching error.
Journal ArticleDOI
Using Large Eddy Simulation for understanding vented gas explosions in the presence of obstacles.
TL;DR: A validated Large Eddy Simulation model of unsteady premixed flame propagation is used to study the phenomenology underlying vented gas explosions in the presence of obstacles, explaining both number and intensity of the overpressure peaks observed.
Journal ArticleDOI
Grid-independent large-eddy simulation using explicit filtering
TL;DR: By using explicit filtering in large-eddy simulation, turbulent statistics and energy spectra are shown to be independent of the mesh resolution used.
Journal Article
Large eddy simulation of the temporal mixing layer using the Clark model
TL;DR: In this paper, the Clark model for large-eddy simulation has been reformulated from a theoretical and computational point of view, and a linear stability analysis of the Burgers equation is performed in order to clarify the nature of the instability.
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.