Abstract
Nonlinear chaotic systems yield many interesting features related to different physical phenomena and practical applications. These systems are very sensitive to initial conditions at each time-iteration level in a numerical algorithm. In this article, we study the behavior of some nonlinear chaotic systems by a new numerical approach based on the concept of Galerkin–Petrov time-discretization formulation. Computational algorithms are derived to calculate dynamical behavior of nonlinear chaotic systems. Dynamical systems representing weather prediction model and finance model are chosen as test cases for simulation using the derived algorithms. The obtained results are compared with classical RK-4 and RK-5 methods, and an excellent agreement is achieved. The accuracy and convergence of the method are shown by comparing numerically computed results with the exact solution for two test problems derived from another nonlinear dynamical system in two-dimensional space. It is shown that the derived numerical algorithms have a great potential in dealing with the solution of nonlinear chaotic systems and thus can be utilized to delineate different features and characteristics of their solutions.
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Acknowledgements
The first author is grateful to Higher Education Commission (HEC) of Pakistan for providing financial support under the research Grant Numbers 21-557/SRGP/R&D/HEC/2014, in order to complete this research work.
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Khan, M.S., Khan, M.I. A novel numerical algorithm based on Galerkin–Petrov time-discretization method for solving chaotic nonlinear dynamical systems. Nonlinear Dyn 91, 1555–1569 (2018). https://doi.org/10.1007/s11071-017-3964-5
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DOI: https://doi.org/10.1007/s11071-017-3964-5