Take-off threshold velocity of solid particles lying under a turbulent boundary layer
Take-off threshold velocity of solid particles lying under a turbulent boundary layer
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湍流边界层下固体颗粒的起飞阈值速度
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
M. Stanislas
中科院分区：
文献类型：
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作者：
J. Foucaut;M. Stanislas
本文研究了风蚀作用下游离固体颗粒的带走。一项初步的文献研究（Foucaut和Stanislas，1995年）使人们能够对Bagnold准则（1941年）进行分析，并表明它与白色（1982年）所得结果的一致性，从而得出一个半经验模型。这一初步研究导致更明智的选择的主要参数，允许更多的物理表示的阈值速度。在本研究中，在一个特定的边界层风洞中进行的标准验证，通过直接测量的阈值速度。其基本思想是缓慢地线性地增加风洞速度，并对第一次起飞进行光学探测。
The take-off of free solid particles by wind erosion has been investigated. A preliminary bibliographic study (Foucaut and Stanislas 1995) has enabled an analysis of the Bagnold criterion (1941) to be made and its accordance with the results obtained by White (1982) to be shown, thus leading to a semi-empirical model. This initial study led to a more judicious choice of the primary parameters, allowing a more physical representation of the threshold velocity. In the present study, the criterion validation was carried out in a specific boundary layer wind tunnel, by means of a direct measurement of the threshold velocity. The basic idea was to increase the wind tunnel velocity slowly and linearly and to perform an optical detection of the first take-offs.