arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1808.07005nlin.PSmath-phmath.MPnlin.SI
收藏

(3+1)维广义浅水波方程的Lie对称性分析和新的周期孤波解

Lie symmetry analysis and new periodic solitary wave solutions of (3+1)-dimensional generalized shallow water wave equation

Sachin Kumar, Dharmendra Kumar

摘要:

流体流动、海洋环境、固体物理和等离子体物理等许多重要的物理问题都可以用浅水波方程来描述。本文利用Lie对称方法构造了(3+1)维广义浅水波(GSWW)方程新的孤立波解。利用(3+1)维GSWW方程在单参数李群变换下的不变性,得到了新的周期孤波、交叉扭折孤子和双周期呼吸子型解等多种解析(封闭)解.利用Lie对称变换,得到了(3+1)维GSWW方程的不同形式的不变解。对于不同的李代数,Lie对称方法将(3+1)维GSWW方程化为各种常微分方程,而对于其中一个李代数,则将其化为著名的(2+1)维BLMP方程.可以肯定,所提出的技术是寻找非线性偏微分方程(PDE)精确解的方便、真实和强大的工具。在适当选择任意函数和参数的情况下,对GSWW方程所得结果进行了二维、三维和等值线图形分析。

英文摘要:

Many important physical situations such as fluid flows, marine environment, solid-state physics and plasma physics have been represented by shallow water wave equation. In this article, we construct new solitary wave solutions for the (3+1)-dimensional generalized shallow water wave (GSWW) equation by using Lie symmetry method. A variety of analytic (closed-form) solutions such as new periodic solitary wave, cross-kink soliton and doubly periodic breather-type solutions have been obtained by using invariance of the concerned (3+1)-dimensional GSWW equation under one-parameter Lie group of transformations. Lie symmetry transformations have applied to generate the different forms of invariant solutions of the (3+1)-dimensional GSWW equation. For different Lie algebra, Lie symmetry method reduces (3+1)-dimensional GSWW equation into various ordinary differential equations (ODEs) while one of the Lie algebra, it is transformed into the well known (2+1)-dimensional BLMP equation. It is affirmed that the proposed techniques are convenient, genuine and powerful tools to find the exact solutions of nonlinear partial differential equations (PDEs). Under the suitable choices of arbitrary functions and parameters, 2D, 3D and contour graphics to the obtained results of GSWW equation are also analyzed graphically.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑