Communications on Applied Mathematics and Computation >

2019 , Vol. 1 >Issue 4: 505 - 523

DOI: https://doi.org/10.1007/s42967-019-00036-7

Numerical Methods for Solving Space Fractional Partial Differential Equations Using Hadamard Finite-Part Integral Approach

  • Yanyong Wang ,
  • Yubin Yan ,
  • Ye Hu
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  • 1 Department of Mathematics, Luliang University, 38 Binghe North East Road, Luliang, Shanxi 033000, China;
    2 Department of Mathematics, University of Chester, CH1 4BJ Chester, UK

Received date: 2018-09-29

  Revised date: 2018-11-09

  Online published: 2019-10-16

Supported by

Y. Wang's research was supported by the Natural Science Foundation of Luliang University (XN201510).

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Abstract

We introduce a novel numerical method for solving two-sided space fractional partial differential equations in two-dimensional case. The approximation of the space fractional Riemann-Liouville derivative is based on the approximation of the Hadamard finite-part integral which has the convergence order O(h3-α), where h is the space step size and α∈(1, 2) is the order of Riemann-Liouville fractional derivative. Based on this scheme, we introduce a shifted finite difference method for solving space fractional partial differential equations. We obtained the error estimates with the convergence orders O(τ+h3-α+hβ), where τ is the time step size and β>0 is a parameter which measures the smoothness of the fractional derivatives of the solution of the equation. Unlike the numerical methods for solving space fractional partial differential equations constructed using the standard shifted Grünwald-Letnikov formula or higher order Lubich's methods which require the solution of the equation to satisfy the homogeneous Dirichlet boundary condition to get the first-order convergence, the numerical method for solving the space fractional partial differential equation constructed using the Hadamard finite-part integral approach does not require the solution of the equation to satisfy the Dirichlet homogeneous boundary condition. Numerical results show that the experimentally determined convergence order obtained using the Hadamard finite-part integral approach for solving the space fractional partial differential equation with non-homogeneous Dirichlet boundary conditions is indeed higher than the convergence order obtained using the numerical methods constructed with the standard shifted Grünwald-Letnikov formula or Lubich's higher order approximation schemes.

Key words： Riemann-Liouville fractional derivative; Space fractional partial differential equation; Error estimates

Cite this article

Yanyong Wang , Yubin Yan , Ye Hu . Numerical Methods for Solving Space Fractional Partial Differential Equations Using Hadamard Finite-Part Integral Approach[J]. Communications on Applied Mathematics and Computation, 2019 , 1(4) : 505 -523 . DOI: 10.1007/s42967-019-00036-7

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