Propagation of nonlinear shock waves for the generalised Oskolkov equation and its dynamic motions in the presence of an external periodic perturbation
     
Yazarlar (4)
Turgut Ak Yalova Üniversitesi, Türkiye
Doç. Dr. Tuğba AYDEMİR Yalova Üniversitesi, Türkiye
Asıt Saha Sikkim Manipal Institute Of Technology, Hindistan
Abdul Hamıd Kara University Of The Witwatersrand, Johannesburg, Güney Afrika Cumhuriyeti
Makale Türü Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
Dergi Adı Pramana Journal of Physics (Q3)
Dergi ISSN 0304-4289 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SCI-Expanded
Makale Dili İngilizce Basım Tarihi 12-2018
Cilt / Sayı / Sayfa 90 / 6 / 77–93 DOI 10.1007/s12043-018-1564-7
Makale Linki http://dx.doi.org/10.1007/s12043-018-1564-7
Özet
Propagation of nonlinear shock waves for the generalised Oskolkov equation and dynamic motions of the perturbed Oskolkov equation are investigated. Employing the unified method, a collection of exact shock wave solutions for the generalised Oskolkov equations is presented. Collocation finite element method is applied to the generalised Oskolkov equation for checking the accuracy of the proposed method by two test problems including the motion of shock wave and evolution of waves with Gaussian and undular bore initial conditions. Considering an external periodic perturbation, the dynamic motions of the perturbed generalised Oskolkov equation are studied depending on the system parameters with the help of phase portrait and time series plot. The perturbed generalised Oskolkov equation exhibits period-3, quasiperiodic and chaotic motions for some special values of the system parameters, whereas the generalised Oskolkov equation presents shock waves in the absence of external periodic perturbation.
Anahtar Kelimeler
chaos | collocation | Generalised Oskolkov equation | quasiperiodicity | shock wave | unified method