Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

A Fitted Numerical Scheme with Algorithm for Singularly Perturbed Parabolic Partial Differential Equations with Large Negative Shift

Version 1 : Received: 7 October 2023 / Approved: 7 October 2023 / Online: 7 October 2023 (09:31:16 CEST)

How to cite: Ejere, A.H.; Duressa, G.F. A Fitted Numerical Scheme with Algorithm for Singularly Perturbed Parabolic Partial Differential Equations with Large Negative Shift. Preprints 2023, 2023100406. https://doi.org/10.20944/preprints202310.0406.v1 Ejere, A.H.; Duressa, G.F. A Fitted Numerical Scheme with Algorithm for Singularly Perturbed Parabolic Partial Differential Equations with Large Negative Shift. Preprints 2023, 2023100406. https://doi.org/10.20944/preprints202310.0406.v1

Abstract

This research work deals with the formulation of numerical scheme with algorithm to compute singularly perturbed partial differential equations(SP-PDEs) involving a significant negative shift. The problem involves small parameter which causes a rapidly changing boundary layers in the vicinity of a body, and the negative shift term causes interior layer. Such appearance of an abruptly varying layers causes difficulties to find the exact solution and it is not adequate to employ classical numerical methods. The technique presented in this research work simplifies these challenges and yields accurate numerical solution.The stability and convergence analyses of the methods are examined and proven. To test the developed technique, numerical experiments are carried out and confirmed with theoretical analysis.

Keywords

Singular perturbation; Boundary layer; Interior layer; Negative shift term; Uniform convergence

Subject

Computer Science and Mathematics, Computational Mathematics

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