EPL-2016_accepted.pdf (694.2 kB)
Macroscopic dynamics of incoherent soliton ensembles: soliton-gas kinetics and direct numerical modelling
journal contribution
posted on 2016-02-26, 14:44 authored by F. Carbone, D. Dutykh, Gennady ElWe undertake a detailed comparison of the results of direct numerical simulations of
the soliton gas dynamics for the Korteweg-de Vries equation with the analytical predictions inferred from the exact solutions of the relevant kinetic equation for solitons. Two model problems are considered: i) the propagation of a “trial” soliton through a one-component “cold” soliton gas consisting of randomly distributed solitons of approximately the same amplitude; and ii) the collision
of two cold soliton gases of different amplitudes (the soliton gas shock tube problem) leading to the formation of an expanding incoherent dispersive shock wave. In both cases excellent agreement is observed between the analytical predictions of the soliton gas kinetics and the direct numerical simulations. Our results confirm the relevance of the kinetic equation for solitons as a quantitatively accurate model for macroscopic non-equilibrium dynamics of incoherent soliton ensembles.
History
School
- Science
Department
- Mathematical Sciences
Published in
Europhysics Letters: a letters journal exploring the frontiers of physicsVolume
113Citation
CARBONE, F., DUTYKH, D. and EL, G.A., 2016. Macroscopic dynamics of incoherent soliton ensembles: soliton-gas kinetics and direct numerical modelling. Europhysics Letters: a letters journal exploring the frontiers of physics, 113, 30003.Publisher
© European Physical SocietyVersion
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2016Notes
This paper was accepted for publication in the journal Europhysics Letters and the definitive published version is available at http://dx.doi.org/10.1209/0295-5075/113/30003ISSN
1286-4854Publisher version
Language
- en