Approximate solution of space fractional order diffusion equations by Gegenbauer collocation and compact finite difference scheme

Solution of space fractional diffusion equation

Authors

  • K. Issa
    Department of Mathematics and Statistics, Kwara State University, Malete, Kwara State, Nigeria.
  • A. S. Olorunnisola
    Department of Mathematics and Statistics, Kwara State University, Malete, Kwara State, Nigeria.
  • O. T. Aliu
    Department of Mathematics and Statistics, Kwara State University, Malete, Kwara State, Nigeria.
  • A. D. Adeshola
    Department of Mathematics and Statistics, Kwara State University, Malete, Kwara State, Nigeria.

Keywords:

Caputo derivative, fractional diffusion equation, Gegenbauer polynomial, Compact finite difference method (CFDM)

Abstract

In this paper, approximation of space fractional order diffusion equation are considered using compact finite difference technique to discretize the time derivative, which was then approximated via shifted Gegenbauer polynomials using zeros of (N - 1) degree shifted Gegenbauer polynomial as collocation points. The important feature in this approach is that it reduces the problems to algebraic linear system of equations together with the boundary conditions gives (N + 1) linear equations. Some theorems are given to establish the convergence and the stability of the proposed method. To validate the efficiency and the accuracy of the method, obtained results are compared with the existing results in the literature. The graphical representation are also displayed for various values of \beta Gegenbauer polynomials. It can be observe in the tables of the results and figures that the proposed method performs better than the existing one in the literature.

Dimensions

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Published

2023-05-22

How to Cite

Approximate solution of space fractional order diffusion equations by Gegenbauer collocation and compact finite difference scheme: Solution of space fractional diffusion equation. (2023). Journal of the Nigerian Society of Physical Sciences, 5(2), 1368. https://doi.org/10.46481/jnsps.2023.1368

Issue

Volume 5, Issue 2, May 2023

Section

Original Research
Copyright & Licensing

Copyright (c) 2023 K. Issa, A. S. Olorunnisola, O. T. Aliu, A. D. Adeshola

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

Approximate solution of space fractional order diffusion equations by Gegenbauer collocation and compact finite difference scheme: Solution of space fractional diffusion equation. (2023). Journal of the Nigerian Society of Physical Sciences, 5(2), 1368. https://doi.org/10.46481/jnsps.2023.1368

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