Communications on Applied Mathematics and Computation ›› 2020, Vol. 2 ›› Issue (4): 653-669.doi: 10.1007/s42967-020-00060-y

• ORIGINAL PAPER • 上一篇    

Second-Order Finite Diference/Spectral Element Formulation for Solving the Fractional Advection-Difusion Equation

Mostafa Abbaszadeh, Hanieh Amjadian   

  1. Department of Applied Mathematics, Faculty of Mathematics and Computer Sciences, Amirkabir University of Technology, No. 424, Hafez Ave., Tehran 15914, Iran
  • 收稿日期:2019-08-14 修回日期:2020-01-12 发布日期:2020-09-11
  • 通讯作者: Mostafa Abbaszadeh, Hanieh Amjadian E-mail:m.abbaszadeh@aut.ac.ir;h.amjadian@aut.ac.ir

Second-Order Finite Diference/Spectral Element Formulation for Solving the Fractional Advection-Difusion Equation

Mostafa Abbaszadeh, Hanieh Amjadian   

  1. Department of Applied Mathematics, Faculty of Mathematics and Computer Sciences, Amirkabir University of Technology, No. 424, Hafez Ave., Tehran 15914, Iran
  • Received:2019-08-14 Revised:2020-01-12 Published:2020-09-11
  • Contact: Mostafa Abbaszadeh, Hanieh Amjadian E-mail:m.abbaszadeh@aut.ac.ir;h.amjadian@aut.ac.ir

摘要: The main aim of this paper is to analyze the numerical method based upon the spectral element technique for the numerical solution of the fractional advection-difusion equation. The time variable has been discretized by a second-order fnite diference procedure. The stability and the convergence of the semi-discrete formula have been proven. Then, the spatial variable of the main PDEs is approximated by the spectral element method. The convergence order of the fully discrete scheme is studied. The basis functions of the spectral element method are based upon a class of Legendre polynomials. The numerical experiments confrm the theoretical results.

关键词: Spectral method, Finite diference method, Fractional advection-difusion equation, Galerkin weak form, Unconditional stability

Abstract: The main aim of this paper is to analyze the numerical method based upon the spectral element technique for the numerical solution of the fractional advection-difusion equation. The time variable has been discretized by a second-order fnite diference procedure. The stability and the convergence of the semi-discrete formula have been proven. Then, the spatial variable of the main PDEs is approximated by the spectral element method. The convergence order of the fully discrete scheme is studied. The basis functions of the spectral element method are based upon a class of Legendre polynomials. The numerical experiments confrm the theoretical results.

Key words: Spectral method, Finite diference method, Fractional advection-difusion equation, Galerkin weak form, Unconditional stability

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