Singularly perturbed robin type boundary value problems with discontinuous source term in geophysical fluid dynamics

Iranian Journal of Numerical Analysis and Optimization

مقاله 6، دوره 11، شماره 2 - شماره پیاپی 20، آذر 2021، صفحه 351-364   

نوع مقاله: Research Article

شناسه دیجیتال (DOI): 10.22067/ijnao.2021.70376.1033

نویسندگان

B.M. Abagero؛ G.F. Duressa؛ H.G. Debela^*

Department of Mathematics, College of Natural Sciences, Jimma University, Jimma, Ethiopia.

چکیده

Singularly perturbed robin type boundary value problems with discontinuous source terms applicable in geophysical fluid are considered. Due to the discontinuity, interior layers appear in the solution. To fit the interior and boundary layers, a fitted nonstandard numerical method is constructed. To treat the robin boundary condition, we use a finite difference formula. The stability and parameter uniform convergence of the proposed method is proved. To validate the applicability of the scheme, two model problems are considered for numerical experimentation and solved for different values of the perturbation parameter, ε, and mesh size, h. The numerical result is tabulated, and it is observed that the present method is more accurate and uniformly convergent with order of convergence of O(h).

کلیدواژه‌ها

Singularly perturbed problem؛ Robin type boundary value problems؛ Discontinuous source term؛ Nonstandared fitted method

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