Discretization of the Caputo time-fractional advection-diffusion problems with certain wavelet basis function

Daniel Iweobodo; Godspower Abanum; Ozioma  Ogoegbulem; Napoleon Ochonogor; Ignatius Njoseh

doi:10.46481/jnsps.2025.2405

Authors

D. C. Iweobodo
[email protected]
Department of Mathematics, Dennis Osadebay University, Asaba, Delta State, Nigeria
G. C. Abanum Department of Mathematics, Dennis Osadebay University, Asaba, Delta State, Nigeria
O. Ogoegbulem Department of Mathematics, Delta State University, Abraka, Delta State, Nigeria
N. I. Ochonogor Department of Mathematics, Dennis Osadebay University, Asaba, Delta State, Nigeria
I. N. Njoseh Department of Mathematics, Delta State University, Abraka, Delta State, Nigeria

Keywords:

Caputo fractional derivatives, Time-fractional advection-diffusion equations (TFADE), Iweobodo-Mamadu-Njoseh wavelet (IMNW), Time discretization, Space discretization

Abstract

Considering the new wavelet-based Galerkin finite element technique constructed with Iweobodo-Mamadu-Njoseh wavelet (IMNW) as the basis function in seeking the numerical solution of time-fractional advection-diffusion equations (TFADE), the TFADE must be simplified to enhance an application of a numerical technique. Thus in this research work, we considered an implementation of the time and space discretization of the TFADE with the
use of IMNW basis function. In order to successfully achieve our result, our methodology inculcated the Caputo fractional derivatives, time fractional advection-diffusion equations (TFADE), Wavelet, IMNW, and Galerkin finite element method. After a successful implementation of the time discretization, an implicit form of TFADE was obtained, followed by the implementation of the space discretization which generated the variational formulation of the equation for easy implementation of the scheme. The illustrated numerical solution from using the new technique provided a resulting numerical evidence which aligns with the exact solution.

Dimensions

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