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Zbl 1167.65422
Mart{\'\i}n-Vaquero, J.; Vigo-Aguiar, J.
A note on efficient techniques for the second-order parabolic equation subject to non-local conditions. (English)
[J] Appl. Numer. Math. 59, No. 6, 1258-1264 (2009). ISSN 0168-9274

Summary: Many physical phenomena are modelled by non-classical parabolic boundary value problems with non-local boundary conditions. In [{\it M. Dehghan}, Appl. Numer. Math. 52, No.~1, 39--62 (2005; Zbl 1063.65079)], several methods were compared to approach the numerical solution of the one-dimensional heat equation subject to specifications of mass. One of them was the (3,3) Crandall formula. The scheme displayed in Eq. (64) in that paper is of order $O(h^{2})$, not of order $O(h^{4})$ as proposed by that author. However, it is possible with several changes to derive a Crandall algorithm of order $O(h^{4})$. Here, we compare the efficiency of the new method with the previous results in the same tests, and we reach errors $10^{3}$ to $10^{5}$ times smaller with the new scheme.

MSC 2000:: *65M06 Finite difference methods (IVP of PDE)

Keywords: non-classic boundary value problems; Crandall's formula; convergence; numerical examples

Citations: Zbl 1063.65079

Cited in: Zbl 1167.65423

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