Structures of Turbulent Vortices in Floodplains of Compound Channels

Q4 Environmental Science

Archives of Hydroengineering and Environmental Mechanics Pub Date : 2016-12-01 DOI:10.1515/heem-2016-0018

A. Rimkus

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引用次数: 0

Abstract

Abstract In turbulent flows, several kinds of vortices and their structures are developed. After physical summation al velocities created by them, they intertwine, and the picture obtained from their measurement chronograms is mostly chaotic. Consequently, these structures become masked. It is therefore very difficult to investigate them and despite many studies performed so far, they have not been sufficiently explored. Favorable conditions for investigations of velocity measurement chronograms occurred when sufficient long intervals were observed, in which the above mentioned masking is minimal. In such intervals, the investigation of turbulent vortices and their structures becomes possible, and it has been performed to some degree. The results of these investigations of the compound channel were already discussed in two previously published articles. The first describes all vortices and their structures in the whole water flow of the compound channel. The second contains a detailed analysis of vortices and their structures in the central vertical of the main channel. This article, discuss investigations of coherent structures formed in the floodplain.

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复合河道漫滩湍流旋涡结构研究

在紊流中，形成了几种旋涡及其结构。它们产生物理求和速度后，相互缠绕，从它们的测量计时表中得到的图像大多是混沌的。因此，这些结构被掩盖了。因此，调查它们是非常困难的，尽管迄今为止进行了许多研究，但它们尚未得到充分的探索。当观察到足够长的时间间隔时，出现了研究速度测量计时图的有利条件，在这个时间间隔中，上述掩蔽最小。在这样的时间间隔内，对湍流涡旋及其结构的研究成为可能，并且已经在一定程度上进行了。这些复合通道的研究结果已经在之前发表的两篇文章中进行了讨论。第一部分描述了复合通道中水流的所有涡及其结构。第二部分详细分析了主航道中央垂直方向的涡旋及其结构。本文讨论了在洪泛区形成的相干结构的研究。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Archives of Hydroengineering and Environmental Mechanics Environmental Science-Water Science and Technology

CiteScore

1.30

自引率

0.00%

发文量

期刊介绍： Archives of Hydro-Engineering and Environmental Mechanics cover the broad area of disciplines related to hydro-engineering, including: hydrodynamics and hydraulics of inlands and sea waters, hydrology, hydroelasticity, ground-water hydraulics, water contamination, coastal engineering, geotechnical engineering, geomechanics, structural mechanics, etc. The main objective of Archives of Hydro-Engineering and Environmental Mechanics is to provide an up-to-date reference to the engineers and scientists engaged in the applications of mechanics to the analysis of various phenomena appearing in the natural environment.