溃坝与溃坝建模的配置离散子域无网格方法

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2019-03-14 DOI:10.1680/JWAMA.16.00101

Babak Fazli Malidareh, S. Hosseini

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引用次数: 2

摘要

本文介绍了一种“配置离散子域无网格法”，用于求解具有泥沙质量守恒的自由水面浅水方程。该方法采用分布式节点对计算域进行离散。形状函数采用移动最小二乘法求解，既高效又简单。使用若干独立于节点点的并置点构成指定残差函数。在问题域和边界上，每个子域的并置点残差之和为零。此外，边界条件很容易执行。通过对溃坝水流的模拟和物理模拟结果的比较，验证了模型的正确性。解析解与实验实测数据吻合较好，具有较高的收敛速度和效率。该方法对于研究水流与泥沙耦合输运的各种问题似乎具有重要的潜力。

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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Collocated discrete subdomain meshless method for dam-break and dam-breaching modelling

This paper introduces a ‘collocated discrete subdomain meshless method’ to solve shallow water equations for free-surface flows with conservation of sediment mass. The computational domain in the method is discretised by distributed nodal points. Shape functions are made using the moving least-squares method for efficiency and simplicity. A number of collocation points, independent of nodal points, are used to form the specified residual function. The sum of residuals at the collocation points for each subdomain is zero in the problem domain and boundaries. In addition, boundary conditions are readily enforced. The model was verified by comparing results of simulated and physically modelled dam-break flows. There was good agreement between the analytical solution and experimental measured data, and a high convergence rate and efficiency were achieved. The method appears to have significant potential for investigating a variety of problems concerning coupled flow with sediment transport.

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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.