土木学会論文集B2(海岸工学)
Online ISSN : 1883-8944
Print ISSN : 1884-2399
論文
振動流下シートフロー状粒子流の内部構造の画像解析
原田 英治後藤 仁志
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ジャーナル フリー

2014 年 70 巻 2 号 p. I_746-I_750

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Interactions between contacting and colliding particles associated with energy dissipation mainly dominate sediment transport under oscillatory sheet-flow regime, where hysteretic-dependent complicated behavior dominates over periodical one due to a change in microscopic particle configuration even under the fully periodically oscillatory external forces. Difference in response time between solid particle and carrier phase to oscillatory flow furnish momentum transfer, resulting phase-dependent particle stress should be estimated to ascertain detail mechanism of the sheet-flow regime. In the present study, particle velocity under oscillatory flow is extracted from video sequence taken through the sidewall, accordingly phase-dependent particle shear stress is revealed.

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