Showing papers in "Journal of Wind Engineering and Industrial Aerodynamics in 2012"

TL;DR: A series of wind tunnel experiments have been carried out to determine aerodynamic forces and wind pressures acting on square-plan tall building models with various configurations: corner cut, setbacks, helical and so on.

TL;DR: In this paper, the impact of a wide range of computational parameters on the cross-ventilation flow in a generic isolated single-zone building was investigated, and the results of the diffusion study showed that the effects of physical and numerical diffusion are very similar.

TL;DR: In this paper, a modification of the turbulence model and wall function formulation is proposed to retrieve an overall consistent treatment of the neutral ABL. But this approach may result in an undesired decay of the velocity and turbulent fully-developed profiles specified at the inlet of the computational domain.

TL;DR: In this paper, the effects of near-wall grid spacing for the SST-K-ω model and study of the aerodynamic behavior of a horizontal axis wind turbine are the two goals of this paper.

TL;DR: In this article, the authors illustrate the research activities linked with the European Project "Wind and Ports: The forecast of wind for the management and the safety of port areas" which involves the Department of Civil, Environmental, and Architectural Engineering of the University of Genova, and the Port Authorities of the Genova and Bastia (France).

TL;DR: In this article, a building array model with a point source located in between the central buildings is adopted as a target configuration for near-field dispersion around buildings by investigating both velocity and concentration fields obtained by two modeling approaches, i.e., RANS RNG k-e and LES.

TL;DR: In this article, experimental results on the unsteady behaviour of the wake of a modelled wind turbine in an atmospheric boundary layer (ABL) wind tunnel are presented. But the results are limited to the case of a single turbine.

TL;DR: In this paper, a wind tunnel study has been performed on roof-mounted solar arrays of two different panel tilt angles, and one of the arrays was also placed on the ground in order to distinguish array generated aerodynamic effects from building generated effects.

TL;DR: In this article, the effect of separating flow past ground vehicles on the rear slant of an Ahmed body on the different structures developing in the wake was analyzed, focusing on the longitudinal vortices developing at each side of the Ahmed body.

TL;DR: In this paper, a model wind turbine blade was scaled to reproduce local flow and icing conditions at the 95% radial station of the NREL Phase VI Rotor and the results matched with predictions to within 1% of both ice thickness and ice extent along the blade surfaces.

TL;DR: In this paper, a large eddy simulation (LES) of the flow around a simplified train model moving through a cross-wind flow is presented, where aerodynamic moments and forces are computed and the results from the dynamic and the steady case simulations are compared.

TL;DR: In this paper, the authors developed a controller for wind farms to optimize the load and power distribution, which is formulated as an optimization problem and solved using an approximation method, and the optimization problem for the wind farm was modeled as a bilinear control system.

TL;DR: In this paper, the vertical and horizontal centrelines of the Silsoe 6m cube are presented and the full-scale data has been processed in 12-min nonoverlapping record blocks of cube surface tap pressure together with the reference upstream approach flow measured at cube height.

TL;DR: In this paper, a large-eddy simulation (LES) is systematically performed to study the turbulent boundary layer over two-dimensional hills and the effects of roughness elements are modeled by adding an external force to the governing equations of the fluids.

TL;DR: In this paper, the wind characteristics (wind speed, direction, and turbulence intensity) and structural responses (strain, acceleration, and displacement responses) during several typhoon events are compared.

TL;DR: In this paper, the authors investigated the effect of wind incidence angle on flow field characteristics in the wake of a wind barrier and found that removing elements from the wind barrier causes very large local velocities immediately downstream from a barrier and strong vorticity in the entire area.

TL;DR: In this article, a fast Bayesian frequency domain method is used for modal identification based on the measured ambient data, where probability is used as a measure for the relative plausibility of outcomes given a model of the structure and measured data.

TL;DR: In this paper, the quality of the numerical predictions of mean wind fields is evaluated with a focus on the identification of model strengths and limitations, based on detailed spatial identification of locations of good or bad comparison, showing how unsteady flow effects within street canyons are a major cause for discrepancies between numerical and experimental results.

TL;DR: In this article, the influence of the urban radiation balance, the urban heat island effect and urban convective heat transfer coefficients (CHTC) on the space cooling demands was determined using computational fluid dynamics (CFD).

TL;DR: In this article, the effects of gap-width on the aerodynamic characteristics of a twin-deck bridge in a nominally smooth flow were investigated, with a specific goal of studying the vortex shedding mechanisms of the bridge deck.

TL;DR: In this article, a spectral and a multifractal analysis performed on 412 time series of wind speed data each of duration of 350 s and sampled at 20 Hz is presented, and the results confirm that the exponent scaling function ζV(q) is nonlinear and concave.

TL;DR: In this paper, the authors present the results of unique full-scale measurements for a situation in which accurate wind tunnel experiments are not possible: natural ventilation and thermal, humidity and CO2 concentration conditions inside a large semi-enclosed multifunctional stadium with relatively small ventilation openings.

TL;DR: In this article, a combined model for buildings in the urban area is proposed that in a central area, where the wind and pollution is most concerned, the buildings are properly resolved in fine grids and non-slip flow condition is prescribed at rigid boundaries whereas in the surrounding region the buildings were treated as drag element and coarse grids are used in computation.

TL;DR: In this paper, a wind tunnel study was carried out with the objective of exploring the effect of shape on vortex induced vibrations of trapezoidal box girder bridge decks, and it was demonstrated that it is possible to derive a virtually vibration free deck and that the angle between the horizontal bottom plate and the inclined side panes is an important parameter in achieving this goal.

TL;DR: In this paper, the velocity measurements were performed in vertical planes by means of particle image velocimetry (PIV) at the repetition rate 500 Hz and proper orthogonal decomposition (POD) was applied to the time-series of the POD expansion coefficients to reveal the dynamics of the modes.

TL;DR: In this article, the authors discuss some of the emerging test methods and challenges being addressed by such facilities with a particular focus on full-scale testing at the "Three Little Pigs" Project at the University of Western Ontario and at the Insurance Institute for Business and Home Safety's new research facility in South Carolina.

TL;DR: In this paper, the effects of translation and surface roughness on tornado-like vortices were studied using Large Eddy Simulation (LES) of a laboratory scale tornado, and the translation was simulated by employing a moving-wall boundary condition.

TL;DR: In this article, a series of field measurements were performed near the portal and the shaft or the adit of the tunnel during normal operation, and the measurements were conducted for several train speeds, including the maximum operation speed of the high speed rail in Taiwan, which is 300 km/h.

TL;DR: In this article, the authors presented the results of numerical investigations of bridge aeroelasticity, in particular static coefficients and instationary flutter derivatives for a symmetric bridge deck section using the Unsteady Reynolds-Averaged Navier-Stokes (URANS) method.

TL;DR: In this paper, a systematic parametrical study on the spanwise length of the computational domain and on spanwise grid density is proposed in the framework of the Benchmark on the Aerodynamics of a Rectangular 5:1 Cylinder (BARC).