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Robin boundary value problems for a singularly perturbed weakly coupled system of convection–diffusion equations having discontinuous source term

  • Proceedings: ICMAA 2016
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Abstract

In this paper, we consider a weakly coupled system of convection–diffusion equations subject to Robin boundary conditions, and having boundary and interior layers. The diffusion term of each equation is multiplied by a small singular perturbation parameter, but these parameters are assumed to be different in magnitude, and the source term is having a discontinuity at a point in the interior of the domain. An upwind scheme is used for the considered problem in conjunction with piecewise uniform Shishkin mesh. It is proved that the numerical approximations produced by this method are almost first order uniformly convergent with respect to both small parameters. Numerical results are presented to validate the theoretical results.

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Acknowledgements

The authors gratefully acknowledge the valuable comments and suggestions from the anonymous referee. The research work of the second author is supported by Council of Scientific and Industrial Research, India.

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  1. Department of Mathematics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India

    S. Chandra Sekhara Rao & Sheetal Chawla

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  1. S. Chandra Sekhara Rao
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  2. Sheetal Chawla
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Correspondence to S. Chandra Sekhara Rao.

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Rao, S.C.S., Chawla, S. Robin boundary value problems for a singularly perturbed weakly coupled system of convection–diffusion equations having discontinuous source term. J Anal 28, 305–321 (2020). https://doi.org/10.1007/s41478-019-00172-6

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  • DOI: https://doi.org/10.1007/s41478-019-00172-6

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