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首页> 外文期刊>Mathematical Problems in Engineering >Investigation of Velocity Distribution in Open Channel Flows Based on Conditional Average of Turbulent Structures
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Investigation of Velocity Distribution in Open Channel Flows Based on Conditional Average of Turbulent Structures

机译：基于湍流结构条件平均值的明渠水流速度分布研究

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摘要

We report the development of a new analytical model similar to the Reynolds-averaged Navier-Stokes equations to determine the distribution of streamwise velocity by considering the bursting phenomenon. It is found that, in two-dimensional (2D) flows, the underlying mechanism of the wake law in 2D uniform flow is actually a result of up/down events. A special experiment was conducted to examine the newly derived analytical model, and good agreement is achieved between the experimental data in the inner region and the model's prediction. The obtained experimental data were also used to examine the DML-Law (dip-modified-log-law), MLW-Law (modified-log-wake law), and CML-Law (Cole's wake law), and the agreement is not very satisfactory in the outer region.
机译：我们报告了一种新的分析模型的发展，该模型类似于雷诺平均的Navier-Stokes方程，通过考虑爆裂现象来确定水流速度的分布。发现在二维（2D）流中，二维均匀流中尾流定律的潜在机制实际上是向上/向下事件的结果。进行了一次特殊的实验来检验新推导的分析模型，并且内部区域的实验数据与模型的预测之间取得了很好的一致性。获得的实验数据还用于检查DML-Law（dip-修改对数-定律），MLW-Law（修改-对数-尾迹定律）和CML-Law（科尔的尾迹定律），但没有达成协议。在外部地区非常令人满意。

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  • 来源
    《Mathematical Problems in Engineering》 |2017年第6期|1458591.1-1458591.9|共9页
  • 作者

    Han Yu; Yang Shu-Qing; Sivakumar Muttucumaru; Qiu Liu-Chao;

  • 作者单位

    China Agr Univ, Coll Water Resources & Civil Engn, Beijing 100083, Peoples R China;

    Univ Wollongong, Sch Civil Min & Environm Engn, Wollongong, NSW 2522, Australia;

    Univ Wollongong, Sch Civil Min & Environm Engn, Wollongong, NSW 2522, Australia;

    China Agr Univ, Coll Water Resources & Civil Engn, Beijing 100083, Peoples R China;

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