Three-dimensional smoothed particle hydrodynamics modeling of near-shore current flows over rough topographic surface

Eslam Gabreil; Haitao Wu; Chen Chen; Jiaye Li; Matteo Rubinato; Xing Zeng; Songdong Shao

doi:10.3389/fmars.2022.935098

Three-dimensional smoothed particle hydrodynamics modeling of near-shore current flows over rough topographic surface

Eslam Gabreil, Haitao Wu, Chen Chen, Jiaye Li, Matteo Rubinato, Xing Zeng, Songdong Shao

Research output: Contribution to journal › Article › peer-review

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Abstract

In this study, a three-dimensional (3D) numerical model based on the smoothed particle hydrodynamics (SPH) approach was developed to simulate the near-shore current flows over a rough topographic surface in the coastal area, where the flows are shallow and demonstrate strong turbulent characteristics. The numerical program is based on the open-source code SPHysics (http://www.sphysics.org), and two major improvements are made to treat the turbulence and rough boundary effects: A modified sub-particle-scale (SPS) eddy viscosity model is developed to address the turbulence transfer of flows, and a drag force equation is included in the momentum equations to account for the influence of roughness element on the bed and lateral boundaries. The computed results of flow velocity, shear stress, and free surface characteristics are compared with the laboratory measurements for a variety of test conditions. It has shown that the present SPH model can accurately simulate 3D-free surface near-shore current flows over a realistic topography with roughness.

Original language	English
Article number	935098
Number of pages	16
Journal	Frontiers in Marine Science
Volume	9
DOIs	https://doi.org/10.3389/fmars.2022.935098
Publication status	Published - 29 Jul 2022

Bibliographical note

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

Funder

This research work is supported by the National Natural Science Foundation of China (no. 51879051), Key Funded Disciplinary Research Promotion Project of Guangdong Higher Education Institutes (no. 226115001023), Major Project of Qinghai Provincial Department of Science and Technology (no. 2021-SF-A6) and GuanDong Basic and Applied Basic Research Foundation (no. 2021A1515110768).

Keywords

drag force
near-shore current
rough topography
SPH
SPHysics
turbulence

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10.3389/fmars.2022.935098Licence: CC BY

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Three-dimensional smoothed particle hydrodynamics modeling of near-shore current flows over rough topographic surface - FRONTIERS IN MARINE SCIENCE

Cite this

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title = "Three-dimensional smoothed particle hydrodynamics modeling of near-shore current flows over rough topographic surface",

abstract = "In this study, a three-dimensional (3D) numerical model based on the smoothed particle hydrodynamics (SPH) approach was developed to simulate the near-shore current flows over a rough topographic surface in the coastal area, where the flows are shallow and demonstrate strong turbulent characteristics. The numerical program is based on the open-source code SPHysics (http://www.sphysics.org), and two major improvements are made to treat the turbulence and rough boundary effects: A modified sub-particle-scale (SPS) eddy viscosity model is developed to address the turbulence transfer of flows, and a drag force equation is included in the momentum equations to account for the influence of roughness element on the bed and lateral boundaries. The computed results of flow velocity, shear stress, and free surface characteristics are compared with the laboratory measurements for a variety of test conditions. It has shown that the present SPH model can accurately simulate 3D-free surface near-shore current flows over a realistic topography with roughness.",

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AU - Gabreil, Eslam

AU - Wu, Haitao

AU - Chen, Chen

AU - Li, Jiaye

AU - Rubinato, Matteo

AU - Zeng, Xing

AU - Shao, Songdong

N1 - This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

PY - 2022/7/29

Y1 - 2022/7/29

N2 - In this study, a three-dimensional (3D) numerical model based on the smoothed particle hydrodynamics (SPH) approach was developed to simulate the near-shore current flows over a rough topographic surface in the coastal area, where the flows are shallow and demonstrate strong turbulent characteristics. The numerical program is based on the open-source code SPHysics (http://www.sphysics.org), and two major improvements are made to treat the turbulence and rough boundary effects: A modified sub-particle-scale (SPS) eddy viscosity model is developed to address the turbulence transfer of flows, and a drag force equation is included in the momentum equations to account for the influence of roughness element on the bed and lateral boundaries. The computed results of flow velocity, shear stress, and free surface characteristics are compared with the laboratory measurements for a variety of test conditions. It has shown that the present SPH model can accurately simulate 3D-free surface near-shore current flows over a realistic topography with roughness.

AB - In this study, a three-dimensional (3D) numerical model based on the smoothed particle hydrodynamics (SPH) approach was developed to simulate the near-shore current flows over a rough topographic surface in the coastal area, where the flows are shallow and demonstrate strong turbulent characteristics. The numerical program is based on the open-source code SPHysics (http://www.sphysics.org), and two major improvements are made to treat the turbulence and rough boundary effects: A modified sub-particle-scale (SPS) eddy viscosity model is developed to address the turbulence transfer of flows, and a drag force equation is included in the momentum equations to account for the influence of roughness element on the bed and lateral boundaries. The computed results of flow velocity, shear stress, and free surface characteristics are compared with the laboratory measurements for a variety of test conditions. It has shown that the present SPH model can accurately simulate 3D-free surface near-shore current flows over a realistic topography with roughness.

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KW - rough topography

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KW - SPHysics

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U2 - 10.3389/fmars.2022.935098

DO - 10.3389/fmars.2022.935098

M3 - Article

SN - 2296-7745

VL - 9

JO - Frontiers in Marine Science

JF - Frontiers in Marine Science

M1 - 935098

ER -

Three-dimensional smoothed particle hydrodynamics modeling of near-shore current flows over rough topographic surface

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