Numerical Simulation of Cylindrical Solitary Waves in Periodic Media
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ArticleKAUST Department
Applied Mathematics and Computational Science ProgramComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Numerical Mathematics Group
Date
2013-07-14Online Publication Date
2013-07-14Print Publication Date
2014-03Permanent link to this record
http://hdl.handle.net/10754/333581
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We study the behavior of nonlinear waves in a two-dimensional medium with density and stress relation that vary periodically in space. Efficient approximate Riemann solvers are developed for the corresponding variable-coefficient first-order hyperbolic system. We present direct numerical simulations of this multiscale problem, focused on the propagation of a single localized perturbation in media with strongly varying impedance. For the conditions studied, we find little evidence of shock formation. Instead, solutions consist primarily of solitary waves. These solitary waves are observed to be stable over long times and to interact in a manner approximately like solitons. The system considered has no dispersive terms; these solitary waves arise due to the material heterogeneity, which leads to strong reflections and effective dispersion.Citation
Numerical Simulation of Cylindrical Solitary Waves in Periodic Media 2013, 58 (3):672 Journal of Scientific ComputingPublisher
Springer NatureJournal
Journal of Scientific ComputingarXiv
1209.5164ae974a485f413a2113503eed53cd6c53
10.1007/s10915-013-9747-3