An investigation of the characteristics of dam-break flood in a confluence channel based on the lattice Boltzmann method
Source abstract
Abstract
In this study, we use a lattice Boltzmann method with a multi-relaxation-time model to simulate dam-break flooding in confluence channels with four confluence angles. Compared with physical experiment, the simulation proves reliable. We analyze the influence of the confluence angle on the propagation of dam-break flood. The stage hydrograph at the confluence area can be divided into four stages: before the wavefront reaches—rising rapidly—falling gradually—planarization with periodic fluctuation. The water depth of the measuring points in the confluence area is influenced by two factors: the confluence angle and the distance from the measuring point to the first impact point. The results demonstrate that the backwater effect of the confluence is enhanced at higher confluence angles. As the confluence angle increases, the first impact point moves upstream. Moreover, there is a strong backwater effect close to the first impact point, resulting in superelevation mainly occurring in the confluence area.
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Research context
OpenAlex topics: Lattice Boltzmann Simulation Studies · Flood Risk Assessment and Management · Generative Adversarial Networks and Image Synthesis
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Affiliations
State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University 1 , Chengdu 610065, China
Yunnan Institute of Water & Hydropower Engineering Investigation, Design, and Research 2 , Kunming 650021, China
Funding
National Natural Science Foundation of China
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Show source-provided references
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