DOI: 10.1002/2014GL061069
论文题名: Experimental assessment of Owen's second hypothesis on surface shear stress induced by a fluid during sediment saltation
作者: Walter B. ; Horender S. ; Voegeli C. ; Lehning M.
刊名: Geophysical Research Letters
ISSN: 0094-9802
EISSN: 1944-9533
出版年: 2014
卷: 41, 期: 17 起始页码: 6298
结束页码: 6305
语种: 英语
Scopus关键词: Sediments
; Shear flow
; Wind tunnels
; Current modeling
; Experimental assessment
; Fluid velocities
; Particle mass
; Real situation
; Sediment erosion
; Surface shear stress
; Wind velocities
; Shear stress
; assessment method
; erosion
; experimental study
; magnitude
; numerical model
; saltation
; velocity
英文摘要: A widely used, yet thus far unproven, fluid dynamical hypothesis originally presented by P. R. Owen 50 years ago, states that the surface shear stress induced by a fluid on the ground during equilibrium sediment saltation is constant and independent of the magnitude of the fluid velocity and consequently the particle mass flux. This hypothesis is one of the key elements in almost all current model descriptions of sediment erosion. We measured the surface shear stress in a drifting-sand wind tunnel and found Owen's hypothesis beingmerely an approximation of the real situation. A significant decrease of the fluid stress with increasing wind velocities was measured for low to intermediate particle mass fluxes. For high particle mass fluxes, Owen's hypothesis essentially holds, although a slight increase of the fluid stress was measured. © 2014. American Geophysical Union. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84907943421&doi=10.1002%2f2014GL061069&partnerID=40&md5=c88097667250396ce74b6c858f606b19
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7066
Appears in Collections: 气候减缓与适应
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作者单位: WSL Institute for Snow and Avalanche Research (SLF), Davos, Switzerland
Recommended Citation:
Walter B.,Horender S.,Voegeli C.,et al. Experimental assessment of Owen's second hypothesis on surface shear stress induced by a fluid during sediment saltation[J]. Geophysical Research Letters,2014-01-01,41(17).