Eur. Phys. J. D 62, 39−49 (2011)
https://doi.org/10.1140/epjd/e2010-10331-8

Can non-propagating hydrodynamic solitons be forced to move?

¹ Departamento de Física, FCFM, Universidad de Chile, Casilla 487-3, Santiago, Chile
² Departamento de Física, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Santiago, Chile

^a e-mail: ljgordillo@gmail.com

Received: 1 June 2010
Received in final form: 15 October 2010
Published online: 17 December 2010

Abstract

Development of technologies based on localized states depends on our ability to manipulate and control these nonlinear structures. In order to achieve this, the interactions between localized states and control tools should be well modelled and understood. We present a theoretical and experimental study for handling non-propagating hydrodynamic solitons in a vertically driven rectangular water basin, based on the inclination of the system. Experiments show that tilting the basin induces non-propagating solitons to drift towards an equilibrium position through a relaxation process. Our theoretical approach is derived from the parametrically driven damped nonlinear Schrödinger equationwhich models the system. The basin tilting effect is modelled by promoting the parameters that characterize the system, e.g. dissipation, forcing and frequency detuning, as space dependent functions. A motion law for these hydrodynamic solitons can be deduced from these assumptions. The model equation, which includes a constant speed and a linear relaxation term, nicely reproduces the motion observed experimentally.