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Journal of Emerging Trends in Engineering and Applied Sciences (JETEAS)


Article Title: Flow Visualization Pressure and Turbulence Measurements past a Low-Rise Building at Normal and Oblique Incidence
by M.Mahmood

This is now an established fact that high suction pressures develop along the leading edges of the building due to the formation of corner vortices when the wind is incident at oblique angles. These high suction pressures result in the roof damages and a total failure and loss of property. The purpose of this study is to have a deeper knowledge of the flow field around a low-rise building by conducting various types of experiments. The results from experiments carried out on a Texas tech university building models (TTU) with a scale of 1:100 in wind tunnel under various flow conditions. Both sharp-edged models and round edged models were used to conduct the flow and turbulence experiments. The results from flow visualization experiments reveal that there exists a separation and recirculation region on rooftop at normal incidence and corner vortices form at oblique incidence. Also the results show that by changing the height of the building models, there takes place a change in suction levels on the rooftop and also a different positive pressure is observed in front of the building. Different magnitude of rounding of roof edges influencing the suction pressures, turbulence levels and flows differently. This understanding of flow field around the building will help the scientists and engineers to make necessary changes in building design to influence the flow field, which shall minimize the damages caused by adverse wind conditions.
Keywords: roof heights, low-rise building, flow visualization, suction pressure, scale models, vortices, roof top edges, oblique angles, turbulence intensity, smooth flow, turbulent flow
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ISSN: 2141-7016

Editor in Chief.

Prof. Gui Yun Tian
Professor of Sensor Technologies
School of Electrical, Electronic and Computer Engineering
University of Newcastle
United Kingdom



Copyright © Journal of Emerging Trends in Engineering and Applied Sciences 2010