Mixed finite element method for the nonlinear time-fractional stochastic fourth-order reaction–diffusion equation

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Abstract

The nonlinear time-fractional stochastic fourth-order reaction–diffusion equation perturbed by noises is considered by the mixed finite element method in this paper. Based on the mixed finite element in spatial direction and the generalized BDF2−θ in temporal discretization, the semi- and fully-discrete schemes are obtained. Further, the error estimates for the semi- and fully-discretizations and the regularity of solution are derived by some important lemmas. The numerical experiment is conducted to further confirm the theoretical results.

Original languageEnglish
Pages (from-to)39-55
Number of pages17
JournalComputers and Mathematics with Applications
Volume84
DOIs
StatePublished - 15 Feb 2021

Keywords

  • Error estimates
  • Generalized BDF2−θ
  • Mixed finite element
  • Nonlinear time-fractional stochastic fourth-order reaction–diffusion equation
  • Regularity

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