Typology of the flow structures in dividing open channel flows
Typology of the flow structures in dividing open channel flows
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DOI：
10.1080/00221686.2016.1212409
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发表时间：
2017-01
影响因子：
2.3
通讯作者：
Adrien Momplot;G. Lipeme Kouyi;E. Mignot;N. Rivière;J. Bertrand-Krajewski
中科院分区：
文献类型：
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作者：
Adrien Momplot;G. Lipeme Kouyi;E. Mignot;N. Rivière;J. Bertrand-Krajewski
摘要本文旨在描述两种不同的回流结构观察到的数值和实验的横向分支的分流明渠流与相同的下游堰。还研究了导致每个确定的再循环结构的流动条件。第一种再循环模式是经典的二维闭合再循环，通常在文献中描述。第二个是一个三维螺旋形的回流，不同于第一个，特别是关于流线行为。我们发现，发生的每一个结构的回流可以预测的弗劳德数和高宽比的上游通道的分叉。
ABSTRACT This paper aims at describing two different recirculation structures observed both numerically and experimentally in the lateral branch of a dividing open channel flow with identical downstream weirs. The flow conditions leading to each identified recirculation structure are also investigated. The first recirculation pattern is a classic two-dimensional closed recirculation, typically described in the literature. The second one is a three-dimensional helix-shaped recirculation that differs from the first one notably regarding the streamline behaviour. We show that the occurrence of each structure of recirculation can be predicted by means of the Froude number and the aspect ratio in the upstream channel of the bifurcation.