A two-layer viscous Boussinesq-type model is developed to simulate the wave energy dissipation during wave propagation in deep water. The viscous terms are incorporated into both the dynamic and kinematic boundary conditions at the free surface, and the corresponding analytical solution of the second-order amplitude has been derived for the first time. The linear and nonlinear properties of the model are analyzed with different viscosity coefficients. When the viscosity coefficient is 1 × 10−4 m2/s, the linear phase velocity, decay rate, second-order amplitude, and velocity profiles of the viscous model are accurate for up to h/L0 (h is water depth, L0 is characteristic wavelength) ≈ 8.66, 5.86, 3.60, 3.60, and 7.51 within 1% error, respectively. The finite difference method is adopted for the numerical implementation of the model. To verify the linear and nonlinear properties of the model, computed results for linear waves and focused wave group in deep water are compared with linear analytical solutions and experimental data, respectively.
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March 2023
Research Article|
March 21 2023
A two-layer viscous Boussinesq-type model for surface waves: Derivation, analysis, numerical implementation, and verification
Hao Sun (孙昊)
;
Hao Sun (孙昊)
a)
(Conceptualization, Formal analysis, Methodology, Software, Writing – original draft, Writing – review & editing)
1
Shandong Provincial Key Laboratory of Ocean Engineering, Ocean University of China
, Qingdao 266100, China
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Yang Zhao (赵洋)
;
Yang Zhao (赵洋)
(Formal analysis, Funding acquisition, Methodology, Validation, Writing – review & editing)
1
Shandong Provincial Key Laboratory of Ocean Engineering, Ocean University of China
, Qingdao 266100, China
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Zhongbo Liu (刘忠波)
;
Zhongbo Liu (刘忠波)
a)
(Conceptualization, Funding acquisition, Methodology, Project administration, Supervision, Writing – review & editing)
2
Transportation Engineering College, Dalian Maritime University
, Dalian 116026, China
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Yong Liu (刘勇)
Yong Liu (刘勇)
a)
(Conceptualization, Funding acquisition, Methodology, Project administration, Supervision, Writing – review & editing)
1
Shandong Provincial Key Laboratory of Ocean Engineering, Ocean University of China
, Qingdao 266100, China
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Physics of Fluids 35, 037126 (2023)
Article history
Received:
January 10 2023
Accepted:
March 01 2023
Citation
Hao Sun, Yang Zhao, Zhongbo Liu, Yong Liu; A two-layer viscous Boussinesq-type model for surface waves: Derivation, analysis, numerical implementation, and verification. Physics of Fluids 1 March 2023; 35 (3): 037126. https://doi.org/10.1063/5.0141982
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