This paper presents an efficient numerical technique for solving a class of time-fractional diffusion equation. The time-fractional derivative is described in the Caputo form. The L1 scheme is used for discretization of Caputo fractional derivative and a collocation approach based on sextic B-spline basis function is employed for discretization of space variable. The unconditional stability of the fully-discrete scheme is analyzed. Two numerical examples are considered to demonstrate the accuracy and applicability of our scheme. The proposed scheme is shown to be sixth order accuracy with respect to space variable and (2 - alpha)-th order accuracy with respect to time variable, where alpha is the order of temporal fractional derivative. The numerical results obtained are compared with other existing numerical methods to justify the advantage of present method. The CPU time for the proposed scheme is provided.

A numerical technique based on B-spline for a class of time-fractional diffusion equation

Cavoretto, R
2023-01-01

Abstract

This paper presents an efficient numerical technique for solving a class of time-fractional diffusion equation. The time-fractional derivative is described in the Caputo form. The L1 scheme is used for discretization of Caputo fractional derivative and a collocation approach based on sextic B-spline basis function is employed for discretization of space variable. The unconditional stability of the fully-discrete scheme is analyzed. Two numerical examples are considered to demonstrate the accuracy and applicability of our scheme. The proposed scheme is shown to be sixth order accuracy with respect to space variable and (2 - alpha)-th order accuracy with respect to time variable, where alpha is the order of temporal fractional derivative. The numerical results obtained are compared with other existing numerical methods to justify the advantage of present method. The CPU time for the proposed scheme is provided.
2023
39
45
64
Caputo's derivative; collocation; Sextic B‐spline; stability analysis; time‐fractional diffusion equation
Roul, P; Goura, VMKP; Cavoretto, R
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1872118
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