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Lattice Boltzmann simulation of plunging breakers

Eswaran, Dinesh Kumar / Annamalaisamy, Sannasiraj Sannasi / Vallam, Sundar

In the present work, the conservative phase-field lattice Boltzmann model is applied to simulate plunging breakers in shallow waters. The solver is computationally efficient as it is explicit in time stepping and does not require a solution for the pressure Poisson equation. Nevertheless, the solver can simultaneously handle a large Reynolds number ( $ =10^4 $ $= 10^{4}$ ) and a high-density ratio of 1000. Simulations are performed by varying initial steepness and dispersion parameters, which influence the nonlinearity degree of wave (or the growth speed of instability) and the oscillatory motion (limited by the bottom) on the breaking characteristics. Detailed analyses of kinematics, air entrainment, vorticity, and energy dissipation are presented.

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Lattice Boltzmann simulation of plunging breakers

Eswaran, Dinesh Kumar / Annamalaisamy, Sannasiraj Sannasi / Vallam, Sundar

In the present work, the conservative phase-field lattice Boltzmann model is applied to simulate plunging breakers in shallow waters. The solver is computationally efficient as it is explicit in time stepping and does not require a solution for the pressure Poisson equation. Nevertheless, the solver can simultaneously handle a large Reynolds number ( $ =10^4 $ $= 10^{4}$ ) and a high-density ratio of 1000. Simulations are performed by varying initial steepness and dispersion parameters, which influence the nonlinearity degree of wave (or the growth speed of instability) and the oscillatory motion (limited by the bottom) on the breaking characteristics. Detailed analyses of kinematics, air entrainment, vorticity, and energy dissipation are presented.

Lattice Boltzmann simulation of plunging breakers

Eswaran, Dinesh Kumar / Annamalaisamy, Sannasiraj Sannasi / Vallam, Sundar

In the present work, the conservative phase-field lattice Boltzmann model is applied to simulate plunging breakers in shallow waters. The solver is computationally efficient as it is explicit in time stepping and does not require a solution for the pressure Poisson equation. Nevertheless, the solver can simultaneously handle a large Reynolds number ( $ =10^4 $ $= 10^{4}$ ) and a high-density ratio of 1000. Simulations are performed by varying initial steepness and dispersion parameters, which influence the nonlinearity degree of wave (or the growth speed of instability) and the oscillatory motion (limited by the bottom) on the breaking characteristics. Detailed analyses of kinematics, air entrainment, vorticity, and energy dissipation are presented.

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Title:

Lattice Boltzmann simulation of plunging breakers

Contributors:

Eswaran, Dinesh Kumar (author) / Annamalaisamy, Sannasiraj Sannasi (author) / Vallam, Sundar (author)

Published in:

Journal of Hydraulic Research ; 62 ; 383-390

Publication date:

2024-07-03

Size:

8 pages

ISSN:

0022-1686 , 1814-2079

DOI:

https://doi.org/10.1080/00221686.2024.2377144

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Lattice Boltzmann method , phase-field , breaking waves , plunging breaker

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