Numerical modeling of the dam-break flood over natural rivers on movable beds

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-11-28 DOI:10.1515/ijnsns-2021-0273

A. Issakhov, Aliya Borsikbayeva, A. Abylkassymova, A. Issakhov, A. Khikmetov

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引用次数: 2

Abstract

Abstract In the present work, a modified numerical model was developed to simulate the water flow during a dam break with the mud layer transfer of different heights, consisting of three phases (water, air, and a phase for deposition). To carry out a numerical simulation of this process, a mathematical model based on the VOF (volume of fluid) method was modified, taking into account the movement of the water-free surface, which is carried out by the movement of water flow based on the Newtonian fluid model, and the movement of mud impurities is based on the non-Newtonian fluid model. Validation of the constructed model for the influence of three-dimensional features of the flow on morphological changes is carried out by a modified mathematical model and compared with the results of calculation for two-dimensional (2D) and three-dimensional (3D) models. The proposed method for modeling is applied on a real complex terrain, which was based on the Kargalinka – a river in Almaty and the Almaty region of Kazakhstan, the right tributary of the Kaskelen River. Simulation analysis is carried out for cases with different deposit heights. All results of the numerical simulation can be visually viewed using graphs and illustrations.

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天然河流动床溃坝洪水的数值模拟

摘要在本工作中，建立了一个修正的数值模型来模拟不同高度泥层转移的溃坝期间的水流，该模型由三个阶段（水、空气和沉积阶段）组成。为了对这一过程进行数值模拟，对基于VOF（流体体积）方法的数学模型进行了修改，考虑了自由水面的运动，该运动是基于牛顿流体模型的水流运动，而泥浆杂质的运动是基于非牛顿流体模型。通过修改的数学模型验证所构建的模型对流动的三维特征对形态变化的影响，并将其与二维（2D）和三维（3D）模型的计算结果进行比较。所提出的建模方法应用于真实的复杂地形，该地形基于阿拉木图的Kargalinka河和哈萨克斯坦阿拉木图地区的Kaskelen河的右支流。对不同矿床高度的情况进行了模拟分析。数值模拟的所有结果都可以通过图形和插图直观地查看。

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

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.