China
Modified Korteweg-de Vries equations are used to describe certain phenomena in nonlinear optics, fluid dynamics, plasma physics, ocean physics and gas dynamics. In this paper, we investigate a damped variable-coefficient fifth-order modified Korteweg-de Vries equation for the small-amplitude surface waves in a strait or large channel of slowly-varying depth, width and non-vanishing vorticity. Via the truncated Painlevé expansion, Painlevé-type auto-Bäcklund transformations are obtained.
Based on the Painlevé-type auto-Bäcklund transformations, periodic solutions and one-soliton solutions are derived. The soliton-like solutions are constructed via the modified Kudryashov method. We graphically show the kink-type solitons of the soliton solutions. Graphic analysis shows that the shapes, characteristic lines and velocities of the solitons are related to α1(t) and β(t), while the soliton backgrounds and amplitudes just depend on γ (t), in which α1(t), β(t) and γ (t) are the dispersive, dissipative and line-damping coefficients of the equation we investigated, respectively, where t is the temporal variable.
© 2008-2025 Fundación Dialnet · Todos los derechos reservados