Distribution of the Velocity Profile via Analytical and Three-Dimensional Numerical Vegetation Modeling

IF 17.7 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-07-03 DOI:10.47176/jafm.17.9.2487

A. A. Hussain, M. A. Al-Obaidi, A. S. Mohammed, Y. M. John, F. L. Rashid

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Abstract

Understanding the ecological conditions of vegetation growth in water sources is vital to appraise the influence of vegetation on river engineering. Based on the experimental information that is accessible, the consequences of vegetation on flow resistance is described as an alteration in the drag coefficient and the planned area. The current study analytically estimates the vertical distribution of stream-wise velocity in open-channel flow while considering rigid and flexible vegetation. The flow is vertically separated into top free water layer and bottom vegetation layer using the projected deflection height of both vegetation. Related momentum calculations for each layer are then derived. Based on the gathered experimental data, a 3D numerical model with various simulation situations is used to model, calibrate, and evaluate the artificial cylinders. A considerable deflection analysis is utilised to calculate the velocity-dependent stem height. This has proven to be more precise compared to formerly deflection investigation. The estimated outcomes show that precise predictions may be made for the vertical contours of vertical Reynolds shear stress based on mean horizontal velocity. The numerical simulations demonstrate that plant flexibility reduces the vertical Reynolds shear stress and prompted flow resistance force of the vegetation.

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通过分析和三维数值植被建模得出的流速分布图

了解水源地植被生长的生态条件对于评估植被对河流工程的影响至关重要。根据现有的实验资料，植被对水流阻力的影响表现为阻力系数和规划面积的改变。本研究在考虑刚性和柔性植被的情况下，通过分析估算了明渠水流中流速的垂直分布。利用两种植被的投影偏转高度，将水流垂直分为顶部自由水层和底部植被层。然后得出各层的相关动量计算结果。根据收集到的实验数据，使用具有各种模拟情况的三维数值模型对人工圆柱体进行建模、校准和评估。利用可观的挠度分析来计算随速度变化的茎干高度。事实证明，这比以前的挠度调查更为精确。估算结果表明，可以根据平均水平速度对垂直雷诺切应力的垂直轮廓进行精确预测。数值模拟结果表明，植物的柔韧性降低了垂直雷诺剪应力，并促使植被产生流动阻力。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.