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- Title
Periodic solution and asymptotic behavior of the three-dimensional sixth-order Boussinesq equation in shallow water waves.
- Authors
Zhao, Baojun; Wang, Jiaxin; Dong, Huanhe; Fu, Lei
- Abstract
In this study, the surface wave in inviscid fluid was analyzed. Starting from Euler equation and mass conservation equation, coupled with a set of boundary conditions, the equations obtained by dimensionless method contain two parameters: amplitude parameter α and shallowness parameter β . Using double-series perturbation analysis and scale transformation, the ( 2 + 1 )-dimensional sixth-order Boussinesq equation is derived for the first time. Based on the Lie group analysis, the generator and the single-parameter invariant group of the new Boussinesq equation are obtained. The conservation laws of the equation are given by using the generator and the adjoint equation. Using Hirota's bilinear method, we obtain the bilinear equation and residual equation. The existence of the residual equation shows the incomplete integrability of the Boussinesq equation. And judgment conditions for linear stability and orbital stability are obtained. The one-soliton solution and two-soliton solutions are obtained from the Hirota bilinear form. With the Riemann theta function θ 3 (ϕ , q) , we study the periodic wave solution. When q → 0 , it is proved that the periodic solution can be reduced to the one-soliton solution in the limit case based on the asymptotic behavior. Finally, using the graph, it is found that the periodic wave solution can be regarded as the parallel superposition of the one-soliton solution, and the effects of amplitude parameter α and shallowness parameter β on the amplitude of surface wave are analyzed.
- Subjects
BOUSSINESQ equations; WATER waves; WATER depth; SURFACE waves (Fluids); LIE groups; THETA functions; BACKLUND transformations; SHALLOW-water equations
- Publication
Nonlinear Dynamics, 2024, Vol 112, Issue 1, p643
- ISSN
0924-090X
- Publication type
Article
- DOI
10.1007/s11071-023-09072-8