Direct Measurement of Bottom Shear Stress under Water Waves

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	Direct Measurement of Bottom Shear Stress under Water Waves
	You, Zai-Jin 1; Yin, B. S.2
刊名	JOURNAL OF COASTAL RESEARCH
	2007
页码	1132-1136
关键词	Shear plate orbital velocity wave friction factor wave boundary layer
英文摘要	Wave-induced bottom shear stress is one of the most important parameters in modelling of wave hydrodynamics and coastal sediment transport. A new type of shear plate has been successfully developed to measure instantaneous wave bottom shear stress in a laboratory wave flume. The shear plate measures instantaneous horizontal force by applying the Wheatstone half bridge circuit to detect a tiny horizontal movement of the shear plate. There are about 280 individual test runs carried out over one smooth bed and two roughened beds, respectively. In each test run, instantaneous bottom shear stress was measured at a sampling rate of 10 Hz for about 10 minutes. The measured total horizontal force, which consists of wave-induced bottom shear stress and hydrodynamic pressure, is found linearly proportional to wave height in both laminar and turbulent flows. The wave friction factors measured on the smooth bed are shown to agree excellently with the theoretical values derived in laminar boundary layer flow, but those on the rough beds are affected by the bed roughness length estimated. An empirical formula is also proposed to compute the wave bottom shear stress.
收录类别	SCI
语种	英语
WOS记录号	WOS:000207860300206
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/32596]
专题	海洋研究所_海洋环流与波动重点实验室
作者单位	1.Dept Nat Resources, Coastal Unit, Dangar, NSW 2309, Australia 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	You, Zai-Jin,Yin, B. S.. Direct Measurement of Bottom Shear Stress under Water Waves[J]. JOURNAL OF COASTAL RESEARCH,2007:1132-1136.
APA	You, Zai-Jin,&Yin, B. S..(2007).Direct Measurement of Bottom Shear Stress under Water Waves.JOURNAL OF COASTAL RESEARCH,1132-1136.
MLA	You, Zai-Jin,et al."Direct Measurement of Bottom Shear Stress under Water Waves".JOURNAL OF COASTAL RESEARCH (2007):1132-1136.