Benchmark of computational hydraulics models for open-channel flow with lateral cavities.

IF 1.7 3区 工程技术 Q3 ENGINEERING, CIVIL
Journal of Hydraulic Research Pub Date : 2024-10-17 eCollection Date: 2024-01-01 DOI:10.1080/00221686.2024.2401905
Pablo Ouro, Luis Cea, Sergio Croquer, Wenhao Dong, Orlando Garcia-Feal, Adrián Navas-Montilla, Benedict D Rogers, Tatsuhiko Uchida, Carmelo Juez
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引用次数: 0

Abstract

Computational models in hydro-environmental engineering are diverse in their background formulation and span from two-dimensional depth-averaged shallow water models, to complex fully three-dimensional turbulence models resolving large-eddy simulation with surface capturing techniques, and to Lagrangian particle-based methods. This paper presents a first-of-its-kind comparison of six different computational hydraulics fluid dynamics models, namely Iber+, HO-SWM, GBVC, OpenFOAM (RANS), Hydro3D (LES) and DualSPHysics (SPH), in the prediction of mean velocities and free-surface dynamics in two benchmarks involving open-channel flows with symmetric lateral cavities. Results show that shallow-water models capture relatively well the main large-scale coherent structures of the in-cavity flow, with wider shear layers compared to three-dimensional models, and higher velocities in the main channel. Three-dimensional RANS, LES and SPH yield improved predictions of mean velocities compared with experimental data. Computational cost has been quantified for all models with a logarithmic growth when increasing model complexity. The transverse standing wave is captured by most models, with the shallow-water ones matching the theoretical value, while the three-dimensional models overestimate it slightly.

带侧腔的明渠流动计算水力学模型的基准。
水环境工程中的计算模型在其背景公式和范围上是多种多样的,从二维深度平均浅水模型,到复杂的全三维湍流模型,利用表面捕获技术解决大涡模拟,以及基于拉格朗日粒子的方法。本文首次比较了Iber+、HO-SWM、GBVC、OpenFOAM (RANS)、Hydro3D (LES)和dualspphysics (SPH)六种不同的计算水力学模型在两个涉及对称侧腔的明渠流动基准中的平均速度和自由表面动力学预测。结果表明,浅水模型较好地捕捉了腔内流动的主要大尺度相干结构,与三维模型相比,剪切层更宽,主通道流速更高。与实验数据相比,三维RANS、LES和SPH对平均速度的预测得到了改进。随着模型复杂度的增加,所有模型的计算成本都呈对数增长。大多数模型都能捕捉到横驻波,浅水模型与理论值吻合,而三维模型对横驻波的估计略高。
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
Journal of Hydraulic Research
Journal of Hydraulic Research 工程技术-工程:土木
CiteScore
4.90
自引率
4.30%
发文量
55
审稿时长
6.6 months
期刊介绍: The Journal of Hydraulic Research (JHR) is the flagship journal of the International Association for Hydro-Environment Engineering and Research (IAHR). It publishes research papers in theoretical, experimental and computational hydraulics and fluid mechanics, particularly relating to rivers, lakes, estuaries, coasts, constructed waterways, and some internal flows such as pipe flows. To reflect current tendencies in water research, outcomes of interdisciplinary hydro-environment studies with a strong fluid mechanical component are especially invited. Although the preference is given to the fundamental issues, the papers focusing on important unconventional or emerging applications of broad interest are also welcome.
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