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Title: Macroscopic dynamics of incoherent soliton ensembles: soliton-gas kinetics and direct numerical modelling
Authors: Carbone, F.
Dutykh, D.
El, G.A.
Issue Date: 2016
Publisher: © European Physical Society
Citation: 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.
Abstract: We 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.
Description: This paper was accepted for publication in the journal Europhysics Letters and the definitive published version is available at http://dx.doi.org/10.1209/0295-5075/113/30003
Version: Accepted for publication
DOI: 10.1209/0295-5075/113/30003
URI: https://dspace.lboro.ac.uk/2134/20416
Publisher Link: http://dx.doi.org/10.1209/0295-5075/113/30003
ISSN: 1286-4854
Appears in Collections:Published Articles (Maths)

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