An equation-free approach to coupled oscillator dynamics: the Kuramoto model example
Abstract
We present an equation-free multi-scale approach to the computational study of the collective dynamics of the Kuramoto model [{\it Chemical Oscillations, Waves, and Turbulence}, Springer-Verlag (1984)], a prototype model for coupled oscillator populations. Our study takes place in a reduced phase space of coarse-grained "observables" of the system: the first few moments of the oscillator phase angle distribution. We circumvent the derivation of explicit dynamical equations (approximately) governing the evolution of these coarse-grained macroscopic variables; instead we use the {\it equation-free framework} [Kevrekidis {\it et al.}, {\it Comm. Math. Sci.} {\bf 1}(4), 715 (2003)] to computationally solve these equations without obtaining them in closed form. In this approach, the numerical tasks for the conceptually existing but unavailable coarse-grained equations are implemented through short bursts of appropriately initialized simulations of the "fine-scale", detailed coupled oscillator model. Coarse projective integration and coarse fixed point computations are illustrated.
Cite
@article{arxiv.nlin/0502016,
title = {An equation-free approach to coupled oscillator dynamics: the Kuramoto model example},
author = {Sung Joon Moon and Ioannis G. Kevrekidis},
journal= {arXiv preprint arXiv:nlin/0502016},
year = {2007}
}
Comments
submitted to the {\it International Journal of Bifurcations and Chaos}