Numerical investigation of solitary wave attenuation and mitigation caused by vegetation using OpenFOAM

IF 1.9 3区工程技术 Q3 ENGINEERING, CIVIL

Coastal Engineering Journal Pub Date : 2023-01-08 DOI:10.1080/21664250.2022.2163844

Chenhao Zhang, Mingliang Zhang

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引用次数: 0

Abstract

ABSTRACT Wave energy can be reduced by coastal vegetation, which is an important aspect of coastal protection engineering. The effect of vegetation characteristics on solitary wave propagation and attenuation is numerically investigated in this study. A 3D numerical model is established based on the Reynolds Averaged Navier Stokes (RANS) equations combined with k-ω shear stress transport (SST) turbulence model, and the Volume of Fluid (VOF) method is used to capture the free water surface. This model is first validated by a series of physical experimental results with high accuracy. Subsequently, the model is used to simulate the interaction between solitary waves and submerged vegetation with different densities, submergence ratios, and distribution modes. The results indicate that the density and submergence ratios of submerged vegetation significantly affect the propagation and attenuation of solitary waves under uniform distribution modes. Compared with the condition of the uniform distribution mode, the solitary wave dissipates more energy after passing through the vegetation zone under the non-uniform distribution modes. Large differences in velocity fields are found for uniform/non-uniform distribution modes, which contribute to understanding the wave dissipation influenced by vegetation characteristics.

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基于OpenFOAM的植被对孤立波衰减和减缓的数值研究

海岸植被可以减少波浪能，这是海岸防护工程的一个重要方面。数值研究了植被特征对孤立波传播和衰减的影响。基于雷诺平均Navier-Stokes（RANS）方程，结合k-ω剪切应力输运（SST）湍流模型，建立了一个三维数值模型，并采用流体体积法（VOF）捕捉自由水面。该模型首先通过一系列高精度的物理实验结果进行了验证。随后，使用该模型模拟了不同密度、淹没率和分布模式下孤立波与淹没植被之间的相互作用。结果表明，在均匀分布模式下，淹没植被的密度和淹没率对孤立波的传播和衰减有显著影响。与均匀分布模式相比，在非均匀分布模式下，孤立波通过植被带后耗散的能量更多。对于均匀/非均匀分布模式，速度场存在很大差异，这有助于理解受植被特征影响的波浪耗散。

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

Coastal Engineering Journal 工程技术-工程：大洋

CiteScore

4.60

自引率

8.30%

发文量

审稿时长

7.5 months

期刊介绍： Coastal Engineering Journal is a peer-reviewed medium for the publication of research achievements and engineering practices in the fields of coastal, harbor and offshore engineering. The CEJ editors welcome original papers and comprehensive reviews on waves and currents, sediment motion and morphodynamics, as well as on structures and facilities. Reports on conceptual developments and predictive methods of environmental processes are also published. Topics also include hard and soft technologies related to coastal zone development, shore protection, and prevention or mitigation of coastal disasters. The journal is intended to cover not only fundamental studies on analytical models, numerical computation and laboratory experiments, but also results of field measurements and case studies of real projects.