Entrainment and adaptation processes in the evolution of collisional bedload layers

Jose M. Gonzalez-Ondina, Philip L.F. Liu, Luigi Fraccarollo

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

We performed laboratory experiments which describe the evolution, from triggering until full formation, of a bedload layer. The phenomenon is driven by a turbulent open-channel flow at about constant discharge since the very initiation of the process. The flow stays uniform and the slope constant during the transient phase, during which we measured the instantaneous velocity and concentration profiles of the solid phase within the bedload layer. The timing of the process is governed by inertia and resistance forces. The bedload layer progressively thickens, fed by sediments entrained from the bed, which is progressively eroded, until the final steady uniform condition (i.e., equilibrium) is reached. We then applied a recent numerical model, able to cope with collisional suspensions using extended kinetic theories, to replicate the experimental results. The model results are used to further analyze and discuss the physical processes within the flow.

原文English
頁(從 - 到)132-142
頁數11
期刊European Journal of Mechanics, B/Fluids
92
DOIs
出版狀態Published - 2022 3月 1

All Science Journal Classification (ASJC) codes

  • 數學物理學
  • 一般物理與天文學

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