A new multistage Parker-Sochacki method for solving the Troesch’s problem

  • Authors

    • Saheed Akindeinde Obafemi Awolowo University
    • Samuel Adesanya Redeemer's University
    • Ramosheuw S. Lebelo Vaal University of Technology
    • Kholeka C. Moloi Vaal University of technology
    2020-07-05
    https://doi.org/10.14419/ijet.v9i2.13231
  • Approximate Analytical Technique, Boundary Value Problems, Parker-Sochacki Method, Troesch Problem

  • Abstract

    In this article, we introduce a new method to obtain an approximate analytical solution of the highly unstable Troesch’s problem. In the proposed method, without recourse to any hyperbolic tangent transformation or finite term approximation of the hyperbolic sine function, the problem is recast as a system of projectively polynomials which allows straightforward computation of the series solution of the problem. The radius of convergence  of the series solution to the problem is derived a-priorly in terms of the parameters of the polynomial system. Using a step length ; the problem domain is divided into subintervals, where corresponding subproblems are defined and solved with Parker-Sochacki method with very high accuracy. Highly accurate piecewise continuous approximate solution is thus obtained on the entire integration interval. The obtained solution, which is valid for every choice of the Troesch parameter , showed comparable accuracy to known numerical solutions in the literature. In particular, new results are presented for large values of  in the range [20;500].

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  • How to Cite

    Akindeinde, S., Adesanya, S., Lebelo, R. S., & Moloi, K. C. (2020). A new multistage Parker-Sochacki method for solving the Troesch’s problem. International Journal of Engineering & Technology, 9(2), 592-601. https://doi.org/10.14419/ijet.v9i2.13231

    Received date: 2018-05-24

    Accepted date: 2019-05-13

    Published date: 2020-07-05