Finite element method for a symmetric tempered fractional diffusion equation

ÇELİK C., DUMAN M.

APPLIED NUMERICAL MATHEMATICS, cilt.120, ss.270-286, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 120
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.apnum.2017.05.012
  • Dergi Adı: APPLIED NUMERICAL MATHEMATICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.270-286
  • Anahtar Kelimeler: Tempered fractional derivative, Galerkin finite element method, Crank-Nicolson method, STOCHASTIC-PROCESS, CONVERGENCE, MOTION
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

A space fractional diffusion equation involving symmetric tempered fractional derivative of order 1 < alpha < 2 is considered. A Galerkin finite element method is implemented to obtain spatial semi-discrete scheme and first order centered difference in time is used to find a fully discrete scheme for tempered fractional diffusion equation. We construct a variational formulation and show its existence, uniqueness and regularity. Stability and error estimates of numerical scheme are discussed. The theoretical and computational study of accuracy and consistence of the numerical solutions are presented. (C) 2017 IMACS. Published by Elsevier B.V. All rights reserved.