Abstract
Using two off-step points and a central point, we discuss a new two-time-level implicit method of order three based on polynomial cubic spline approximations for the solution of the system of 1D nonlinear parabolic equations on a quasi-variable mesh. The proposed method is derived directly from the consistency condition. The stability analysis for a model problem is discussed. The proposed method is tested to solve the coupled Burgers’ equations and Burgers–Huxley equation to demonstrate the utility of the method. We show that the proposed method enables us to obtain the high-accurate numerical solution for high Reynolds number.
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Acknowledgements
This research work is supported by CSIR-SRF, Grant No: 09/045(1161)/2012-EMR-I. The authors thank the reviewers for their valuable suggestions, which substantially improved the standard of the paper.
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Mohanty, R.K., Sharma, S. A new high-accuracy method based on off-step cubic polynomial approximations for the solution of coupled Burgers’ equations and Burgers–Huxley equation. Engineering with Computers 37, 3049–3066 (2021). https://doi.org/10.1007/s00366-020-00982-4
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DOI: https://doi.org/10.1007/s00366-020-00982-4
Keywords
- Nonlinear parabolic equations
- Quasi-variable mesh
- Cubic spline approximations
- Burgers–Huxley equations
- Coupled Burgers’ equation
- Newton’s iterative method