Abstract
Under investigation is a generalized (3 + 1)-dimensional variable- coefficient Kadomtsev– Petviashvili equation in fluid mechanics. Various exact analytical solutions are obtained by Hirota’s bilinear method, such as lump-type, breather wave and kink-solitary wave solutions. We discuss the interaction between lump wave and solitary waves, and the interaction between lump wave and periodic wave. The physical structure and propagation characteristics of obtained solutions are shown by some 3D graphics.
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Appendices
Appendix A
with the constraints
with the constraints
with the constraints
with the constraints
Substituting Eqs. (19), (20), (21) and (22) into Eqs. (3) and (4), respectively, the corresponding lump solution can be obtained. All solutions have been verified as correct by Mathematica.
Appendix B
In the above solutions, \(\varphi _4(t)\), g(t), \(\theta _2(t)\), \(\varphi _8(t)\) and \(\varphi _{13}(t)\) are the same as those of Eq. (18).
where \(\lambda _4\) is integral constant.
where \(\lambda _5\) and \(\lambda _6\) are integral constants.
In Eqs. (36)–(41), \(\varphi _4(t)\), g(t), \(\theta _2(t)\), \(\varphi _8(t)\) and \(\varphi _{13}(t)\) are the same as those of Eq. (35). All solutions have been verified as correct by Mathematica.
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Liu, JG., Zhu, WH. Various exact analytical solutions of a variable-coefficient Kadomtsev–Petviashvili equation. Nonlinear Dyn 100, 2739–2751 (2020). https://doi.org/10.1007/s11071-020-05629-z
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DOI: https://doi.org/10.1007/s11071-020-05629-z