Mesh selection for a nearly singular boundary value problem
In: Journal of scientific computing, Jg. 16 (2001), Heft 4, S. 525-552
Online
academicJournal
- print, 15 ref
Zugriff:
In this paper, we investigate the numerical solution of a model equation uxx = 1ε/2exp(-x-ε (and several slightly more general problems) when ∈ 1 using the standard central difference scheme on nonuniform grids. In particular, we are interested in the error behaviour in two limiting cases: (i) the total mesh point number N is fixed when the regularization parameter e → 0, and (ii) e is fixed when N → oo. Using a formal analysis, we show that a generalized version of a special piecewise uniform mesh [12] and an adaptive grid based on the equidistribution principle share some common features. And the optimal meshes give rates of convergence bounded by |log(∈)| as ∈ → 0 and N is given, which are shown to be sharp by numerical tests.
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Mesh selection for a nearly singular boundary value problem
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Autor/in / Beteiligte Person: | BUDD, Chris J ; HUAXIONG, HUANG ; RUSSELL, Robert D |
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Zeitschrift: | Journal of scientific computing, Jg. 16 (2001), Heft 4, S. 525-552 |
Veröffentlichung: | London; New York, NY: Plenum Publishing, 2001 |
Medientyp: | academicJournal |
Umfang: | print, 15 ref |
ISSN: | 0885-7474 (print) |
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