Numerical model for sediment transportation under breaking wave: The application exploration of VOF-CFD-DEM model in gas-fluid-particle system

IF 5.3 1区工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Computers and Geotechnics Pub Date : 2024-10-22 DOI:10.1016/j.compgeo.2024.106844

Boen Li, Huihuan Ma

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引用次数: 0

Abstract

The Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) model integrated with the Volume of Fluid (VOF) method is applied to study the complex gas-fluid-particle coupled system. To enhance the model’s feasibility, the efficiency and accuracy improvement approaches are implemented into the model, including the coarse-grained method, porous medium replacement and semi-resolved method. To validate the effectiveness and accuracy of the model, simulations of the particle water entry and dam break scenarios are conducted, Subsequently, the VOF-CFD-DEM model is utilized to study the sediment transportation under breaking waves. A comparison of various turbulence models reveals that the stabilized

k - ω

model can simulate the breaking wave with acceptable efficiency and accuracy. The study examines the flow characteristics, forces acting on slopes, and typical sediment movements, providing detailed case studies and data relevant to gas-fluid-particle systems. This work extends the application of the VOF-CFD-DEM model to extreme conditions in ocean engineering, offering a mesoscopic perspective on complex engineering challenges.

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破浪作用下的泥沙输运数值模型：VOF-CFD-DEM 模型在气-流-粒子系统中的应用探索

计算流体动力学-离散元法（CFD-DEM）模型与流体体积法（VOF）相结合，用于研究复杂的气-流-粒子耦合系统。为了提高模型的可行性，在模型中采用了提高效率和精度的方法，包括粗粒度法、多孔介质替代法和半解析法。为了验证模型的有效性和准确性，对颗粒入水和溃坝情景进行了模拟，随后利用 VOF-CFD-DEM 模型研究了溃坝波浪下的泥沙输运。对各种湍流模型进行比较后发现，稳定 k-ω 模型能够以可接受的效率和精度模拟破浪。该研究探讨了流动特性、作用于斜坡的力以及典型的泥沙运动，提供了与气-流-粒子系统相关的详细案例研究和数据。这项工作将 VOF-CFD-DEM 模型的应用扩展到了海洋工程的极端条件，为复杂的工程挑战提供了中观视角。

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来源期刊

Computers and Geotechnics 地学-地球科学综合

CiteScore

9.10

自引率

15.10%

发文量

438

审稿时长

45 days

期刊介绍： The use of computers is firmly established in geotechnical engineering and continues to grow rapidly in both engineering practice and academe. The development of advanced numerical techniques and constitutive modeling, in conjunction with rapid developments in computer hardware, enables problems to be tackled that were unthinkable even a few years ago. Computers and Geotechnics provides an up-to-date reference for engineers and researchers engaged in computer aided analysis and research in geotechnical engineering. The journal is intended for an expeditious dissemination of advanced computer applications across a broad range of geotechnical topics. Contributions on advances in numerical algorithms, computer implementation of new constitutive models and probabilistic methods are especially encouraged.