Improved runge-kutta methods for solving ordinary differential equations

Faranak Rabiei, Fudziah Ismail, Mohamed Suleiman

Research output: Contribution to journalArticleResearchpeer-review

4 Citations (Scopus)

Abstract

In this article we proposed three explicit Improved Runge-Kutta (IRK) methods for solving first-order ordinary differential equations. These methods are two-step in nature and require lower number of stages compared to the classical Runge-Kutta method. Therefore the new scheme is computationally more efficient at achieving the same order of local accuracy. The order conditions of the new methods are obtained up to order five using Taylor series expansion and the third and fourth order methods with different stages are derived based on the order conditions. The free parameters are obtained through minimization of the error norm. Convergence of the method is proven and the stability regions are presented. To illustrate the efficiency of the method a number of problems are solved and numerical results showed that the method is more efficient compared with the existing Runge-Kutta method.

Original languageEnglish
Pages (from-to)1679-1687
Number of pages9
JournalSains Malaysiana
Volume42
Issue number11
Publication statusPublished - Nov 2013
Externally publishedYes

Keywords

  • Convergence and stability region
  • Improved Runge-Kutta methods
  • Order conditions
  • Ordinary differential equations
  • Two-step methods

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