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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Numerical FSI investigation based on LES: Flow past a cylinder with a flexible splitter plate involving large deformations (FSI-PfS-2a)
G. De Nayer,Michael Breuer +1 more
TL;DR: In this article, a detailed numerical investigation on the fluid-structure interaction (FSI) test case presented in Kalmbach and Breuer (2013), 369-387) relies on detailed experimental investigations on fluid flow and structure deformation using modern optical measurement techniques such as particle-image velocimetry and laser triangulation sensors.
Journal ArticleDOI
Lagrangian particle modeling in the indoor environment: A comparison of RANS and LES turbulence methods (RP-1512)
Shichao Liu,Atila Novoselac +1 more
TL;DR: In this article, the dispersion of three different particle sizes (0.7, 2.5, and 7 μm) emitted from typical source positions was investigated for two ventilation patterns: buoyancy-driven and well-mixed ventilation.
Journal ArticleDOI
Large eddy simulations of mixing effects on the course of precipitation process
TL;DR: In this paper, the large eddy simulation (LES) method is used to simulate effects of flow and mixing on precipitation, which is validated by comparing model predictions with experimental data for fast parallel chemical test reactions carried out in the rectangular channel reactor.
Journal ArticleDOI
The effect of an upstream hull on a propeller in reverse rotation
TL;DR: In this paper, a large-eddy simulation (LES) is performed for a propeller with and without a hull at two advance ratios, and the results show that side force is mainly generated from the leading-edge separation on the suction side.
Journal ArticleDOI
Study of three LES subgrid-scale turbulence models for predictions of heat and mass transfer in large-scale compartment fires
Anthony Chun Yin Yuen,Guan Heng Yeoh,Victoria Timchenko,Sherman C.P. Cheung,Timothy Bo Yuan Chen +4 more
TL;DR: In this article, the wall-adaptive features offered by two subgrid-scale (SGS) turbulence models: walladapting local eddy viscosity (WALE) and Vreman against the Smagorinsky model were investigated.
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.