High-Order Numerical Approximation for 2D Time-Fractional Advection–Diffusion Equation under Caputo Derivative

Abstract

In this paper, we propose a novel approach for solving two-dimensional time-fractional advection–diffusion equations, where the fractional derivative is described in the Caputo sense. The discrete scheme is constructed based on the barycentric rational interpolation collocation method and the Gauss–Legendre quadrature rule. We employ the barycentric rational interpolation collocation method to approximate the unknown function involved in the equation. Through theoretical analysis, we establish the convergence rate of the discrete scheme and show its remarkable accuracy. In addition, we give some numerical examples, to illustrate the proposed method. All the numerical results show the flexible application ability and reliability of the present method.

Keywords

• barycentric rational interpolation collocation method
• Caputo derivative
• time-fractional advection–diffusion equation
• Gauss–Legendre quadrature rule