Abstract

In this paper, finite element method with high-order approximation for time fractional derivative is considered and discussed to find the numerical solution of time fractional convection-diffusion equation. Some lemmas are introduced and proved, further the stability and error estimates are discussed and analyzed, respectively. The convergence result O(hr+1 + τ3-α) can be derived, which illustrates that time convergence rate is higher than the order (2-α) derived by L1-approximation. Finally, to validate our theoretical results, some computing data are provided.

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