Applied Mathematics and Mechanics >
Analytical solutions of turbulent boundary layer beneath forward-leaning waves
Received date: 2023-07-25
Online published: 2024-04-08
Supported by
the National Key R&D Program of China(2022YFC3204303);the National Natural Science Foundation of China(12202503);the National Natural Science Foundation of China(12132018);the National Natural Science Foundation of China(52394254);Project supported by the National Key R&D Program of China (No.2022YFC3204303) and the National Natural Science Foundation of China (Nos.12202503, 12132018, and 52394254)
Copyright
As a typical nonlinear wave, forward-leaning waves can be frequently encountered in the near-shore areas, which can impact coastal sediment transport significantly. Hence, it is of significance to describe the characteristics of the boundary layer beneath forward-leaning waves accurately, especially for the turbulent boundary layer. In this work, the linearized turbulent boundary layer model with a linear turbulent viscosity coefficient is applied, and the novel expression of the near-bed orbital velocity that has been worked out by the authors for forward-leaning waves of arbitrary forward-leaning degrees is further used to specify the free stream boundary condition of the bottom boundary layer. Then, a variable transformation is found so as to make the equation of the turbulent boundary layer model be solved analytically through a modified Bessel function. Consequently, an explicit analytical solution of the turbulent boundary layer beneath forward-leaning waves is derived by means of variable separation and variable transformation. The analytical solutions of the velocity profile and bottom shear stress of the turbulent boundary layer beneath forward-leaning waves are verified by comparing the present analytical results with typical experimental data available in the previous literature.
Yiqin XIE, Jifu ZHOU, Xu WANG, Jinlong DUAN, Yongjun LU, Shouqian LI . Analytical solutions of turbulent boundary layer beneath forward-leaning waves[J]. Applied Mathematics and Mechanics, 2024 , 45(4) : 695 -710 . DOI: 10.1007/s10483-024-3099-8
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