ISPH Simulation of Solitary Waves Propagating Over a Bottom-Mounted Barrier With k–ε Turbulence Model

Frontiers in Environmental Science

JianGuo Lin¹  Sheng Yan²  Dong Wang³  Ehsan Kazemi⁴  Xupeng Wang⁵  Chen Chen⁸ 

[1] College of Environmental Science and Engineering, Dalian Maritime University, Dalian, China;College of Transport Engineering, Dalian Maritime University, Dalian, China;Department of Civil and Environmental Engineering, National University of Singapore, Singapore, Singapore;Department of Civil and Structural Engineering, The University of Sheffield, Sheffield, United Kingdom;Hebei Changli Gold Coast National Nature Reserve Management Centre, Changli, China;State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, China;State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin, China;State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, China;

关键词: solitary wave;    barrier;    reflection;    dissipation;    transmission;    flow separation;   

DOI  :  10.3389/fenvs.2021.802091

来源: DOAJ

【 摘 要 】

Solitary wave propagating over a bottom-mounted barrier is simulated using the Incompressible Smoothed Particle Hydrodynamics (ISPH) method in order to study the generation and transport of turbulence associated with flow separation around submerged structures. For an accurate capture of turbulence characteristics during the wave propagation, rather than employing the standard sub-particle scale (SPS) model, the k-ε turbulence model is coupled with the numerical scheme. The results of the numerical model are compared with experimental data, and good agreement is observed in terms of mean velocity, free surface elevation, vorticity fields and turbulent kinetic energy. The numerical model is then employed to investigate the effects of wave non-linearity and geometrical size of the submerged barrier on the flow separation; and calculate the reflection, dissipation and transmission coefficients to evaluate the importance of energy dissipation due to the generation of vortices. The results of this study show that the developed ISPH method with the k-ε turbulence closure model is capable of reproducing the velocity fields and the turbulence characteristics accurately, and thus can be used to perform predictions of comprehensive hydrodynamics of flow-structure interactions in the urban hydro-environment systems.

【 授权许可】

Unknown