A Numerical Method for Singularly Perturbed Convection-diffusion Problems Posed on Smooth Domains

Author:

Hegarty A. F.,O’Riordan E.ORCID

Abstract

AbstractA finite difference method is constructed to solve singularly perturbed convection-diffusion problems posed on smooth domains. Constraints are imposed on the data so that only regular exponential boundary layers appear in the solution. A domain decomposition method is used, which uses a rectangular grid outside the boundary layer and a Shishkin mesh, aligned to the curvature of the outflow boundary, near the boundary layer. Numerical results are presented to demonstrate the effectiveness of the proposed numerical algorithm.

Funder

Dublin City University

Publisher

Springer Science and Business Media LLC

Subject

Computational Theory and Mathematics,General Engineering,Theoretical Computer Science,Software,Applied Mathematics,Computational Mathematics,Numerical Analysis

Reference18 articles.

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2. Barrenechea, G., John, V., Knobloch, P., Rankin, R.: A unified analysis of algebraic flux correction schemes for convection-diffusion equations. SeMA J. Boletin de la Sociedad Española de Matemática Aplicada 75(4), 655–685 (2018)

3. Farrell, P.A., Hegarty, A.F., Miller, J.J.H., O’Riordan, E., Shishkin, G.I.: Robust computational techniques for boundary layers. CRC Press, Boca Raton, Fl

4. Frerichs, D., John, V.: On reducing spurious oscillations in discontinuous Galerkin (DG) methods for steady-state convection-diffusion equations. J. Comput. Appl. Math. 113487, 20 (2021)

5. García-Archilla, B.: Shishkin mesh simulation: a new stabilization technique for convection-diffusion problems. Comput. Methods Appl. Mech. Eng. 256, 1–16 (2013)

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