Journal ArticleDOI
Turbulence characterization of downbursts using LES
TLDR
In this paper, large eddy simulations (LES) of downbursts impinging over four different exposures namely open, countryside, suburban and urban, are performed, where ground surface roughness is simulated using fractal surfaces generated by random Fourier modes (RFM).About:
This article is published in Journal of Wind Engineering and Industrial Aerodynamics.The article was published on 2015-01-01. It has received 60 citations till now. The article focuses on the topics: K-epsilon turbulence model & Turbulence.read more
Citations
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Journal ArticleDOI
Consistent inflow turbulence generator for LES evaluation of wind-induced responses for tall buildings
TL;DR: In this paper, a new turbulent inflow generator technique that can be used as inflow boundary condition for LES of lower atmospheric boundary flow (ABL) is proposed based on synthesizing random divergent-free turbulent velocities.
Journal ArticleDOI
Review on dynamic and quasi-static buffeting response of transmission lines under synoptic and non-synoptic winds
TL;DR: In this paper, the authors reviewed the literature on the dynamic response of a transmission line (TL) system under synoptic wind (conventional atmospheric boundary layer) as well as non-synoptic load loading (downbursts).
Journal ArticleDOI
Thunderstorm response spectrum technique: Theory and applications
TL;DR: In this paper, the structural response to transient phenomena, most notably to earthquakes, is traditionally evaluated by the response spectrum technique, and a new method is formulated that generalizes the old approach from earthquakes to thunderstorms.
Journal ArticleDOI
Aero-elastic testing of multi-spanned transmission line subjected to downbursts
Amal Elawady,Haitham Aboshosha,Ashraf A. El Damatty,Girma Bitsuamlak,Horia Hangan,Ahmed Elatar +5 more
TL;DR: In this paper, the authors report the first aero-elastic test conducted under a scaled downburst wind field at the WindEEE dome facility at the University of Western Ontario, Canada.
Journal ArticleDOI
Downburst-induced transient response of a long-span bridge: A CFD-CSD-based hybrid approach
Jianming Hao,Teng Wu +1 more
TL;DR: In this paper, the time history of non-turbulent downburst wind field is modeled using the impinging jet-based computational fluid dynamics (CFD) approach and the correlated nonstationary fluctuations of the downburst are stochastically simulated by the Hilbertwavelet scheme based on full-scale data, and then superimposed onto the CFD-based transient mean wind field.
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
On the identification of a vortex
Jinhee Jeong,Fazle Hussain +1 more
TL;DR: In this article, the authors propose a definition of vortex in an incompressible flow in terms of the eigenvalues of the symmetric tensor, which captures the pressure minimum in a plane perpendicular to the vortex axis at high Reynolds numbers, and also accurately defines vortex cores at low Reynolds numbers.
Journal ArticleDOI
CFD simulation of the atmospheric boundary layer: wall function problems
TL;DR: In this paper, the authors focus on the simulation of a neutrally stratified, fully developed, horizontally homogeneous ABL over uniformly rough, flat terrain and discuss the problem and its negative consequences.
Journal ArticleDOI
Appropriate boundary conditions for computational wind engineering models using the k-ϵ turbulence model
Peter Richards,R.P. Hoxey +1 more
TL;DR: In this paper, velocity and turbulence profiles associated with the k-ϵ turbulence model are proposed which produce homogeneous conditions, and the cospectrum for the Reynolds stress exhibits a characteristics frequency n o ≈ u ∗ / z which is consistent with the suggested profile equations.
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