New solitary waves in a convecting fluid

Lijun Zhang, Jundong Wang, Elena Shchepakina and Vladimir Sobolev

Chaos, Solitons & Fractals, 2024, vol. 183, issue C

Abstract: It is critical to examine the effects of small perturbations on solitary wave solutions to nonlinear wave equations because of the existence of the unavoidable perturbations in real applications. In this work, we aim to study the solitary wave solutions for the dissipative perturbed mKdV equation which is proposed to model the evolution of shallow wave in a convecting fluid. By using the geometric singular perturbation theorem, the three-dimensional traveling wave system is reduced to a planar dynamical system with regular perturbation. By examining the homoclinic bifurcations via Melnikov method, we show that not only some solitary waves with particularly chosen wave speed persist but also some new type of solitary waves appear under small perturbation. The theoretical analysis results are illustrated by numerical simulations.

Keywords: Dissipative perturbation; mKdV equation; Solitary wave solution; Homoclinic orbit; Melnikov’s method (search for similar items in EconPapers)
Date: 2024
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:chsofr:v:183:y:2024:i:c:s0960077924005058

DOI: 10.1016/j.chaos.2024.114953

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