Eight roughness configurations in Clemson boundary layer wind tunnel are presented. For these configurations, flow parameters such as turbulent intensities, integral length scales, largeand smallscale turbulence, and spectra of velocity components of the wind are obtained and studied to the simulated turbulence. At the same time, new analyzing tools, orthogonal wavelet techniques, are applied t...

In this paper, pollutant dispersion from point source was investigated numerically in an urban area. Numerical simulations were carried out using Computational Fluid Dynamics (CFD) models. The CFD models used for the simulation were based on the steadystate Reynolds-Average Navier-Stoke equations (RANS) with κ-ε turbulence models. A gas pollutant was emitted from a point source within the wake ...

The acrosswind response of isolated reinfe~c~d concrete chimneys of circular cross-section is studied using wind tunnel tests, full-scale measureme,~ts and response predictions based on semi-empirical methods. Three chimneys with available full-scale response observations were selected for this study to compare their measured and predicted responses. The wind tunnel experiments involved measure...

The development of Doppler Global Velocimetry as a flow diagnostic measurement sy s t em nece s s i t a t ed seve ra l innova t i ons to so l ve problems found during wind tunnel testing. These innovations ranged from ratioing a data image with a reference image to remove scattered light variations, dewarping the images to remove optical distortions, and to the use of virtual wind tunnels creat...

Contents i 1 Introduction 1.1 Examples of fluid & flexible structure interaction 1 1.2 Current design practises and wind tunnel testing 2

Aerosol movement into 4 different sentinel cage configurations at 0 degrees, 30 degrees and 60 degrees orientation relative to the aerosol flow in a wind tunnel was studied using a quartz crystal microbalance cascade impactor. The data suggest that a cylinder, screened on all sides, with the longitudinal axis perpendicular to the ground would provide a consistent cage profile to the wind regard...

The paper reports on wind tunnel experiments with an elastically suspended circular cylinder vibrating under the excitation of natural wind of high turbulence degree. The natural wind turbulence was simulated by superposing the low frequency part of the natural wind turbulence on the background high frequency turbulence of the wind tunnel flow. This was done by controlling the propeller rotatio...

Apartment complexes in various forms are built in downtown areas. The arrangement of an apartment complex has great influence on the wind flow inside it. There are issues of residents' walking due to gust occurrence within apartment complexes, problems with pollutant emission due to airflow congestion, and heat island and cool island phenomena in apartment complexes. Currently, the forms of int...

It is highly important in Japan to choose a good site for wind turbines, because the spatial distribution of wind speed is quite complicated over steep complex terrain. We are developing the unsteady numerical model called the Research Institute for Applied Mechanics, Kyushu University, COMputational Prediction of Airflow over Complex Terrain (RIAM-COMPACT). The RIAMCOMPACT is based on the larg...