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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51976

Title: Wind Flow Characteristics and Reynolds Stress Structure Around the Two-dimensional Embankment of Trapezoidal Shape with Different Slope Gradient
Authors: Bao-Shi Shiau
Chuen-Tai Hsieh
Contributors: 國立臺灣海洋大學:河海工程學系
Keywords: Speed-up
Quadrant analysis technique
Reynolds stress
Date: 2002-12
Issue Date: 2019-01-10T03:08:42Z
Publisher: Journal of Wind Engineering and Industrial Aerodynamics
Abstract: Abstract: In this study, wind tunnel measurements for a turbulent boundary layer flow over two-dimensional embankments of trapezoidal shape with different slope gradients were carried out to investigate the wind flow characteristics and the Reynolds stress structure. The quadrant analysis technique was employed to analyze stress component contribution to the Reynolds stress. Measurement on the Reynolds stress structure reveals that both the sweep and ejection events are the major contributors to the Reynolds stress for flow around the embankment with different slope gradients. The contributions to the Reynolds stress made by sweep event are slightly larger than that of ejection event at locations close to the top surface of embankment (Z/H=1.2) with mild slope (slope gradient 4:1). But at higher distance from the top surface of the embankment (Z/H=2), the ejection event contributes more to the Reynolds stress than the sweep event for all cases (slope gradients, 1:1, 2:1, 4:1).
Relation: 90(12-15) pp.1645-1656
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51976
Appears in Collections:[河海工程學系] 期刊論文

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