Tailored finite point method for the interface problem

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March 2009, 4(1): 91-106. doi: 10.3934/nhm.2009.4.91

Tailored finite point method for the interface problem

1.	Dept. of Mathematical Sciences, Tsinghua University, Beijing 100084

Received July 2008 Revised November 2008 Published February 2009

Abstract
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In this paper, we propose a tailored-finite-point method for a numerical simulation of the second order elliptic equation with discontinuous coefficients. Our finite point method has been tailored to some particular properties of the problem, then we can get the approximate solution with the same behaviors as that of the exact solution very naturally. Especially, in one-dimensional case, when the coefficients are piecewise linear functions, we can get the exact solution with only one point in each subdomain. Furthermore, the stability analysis and the uniform convergence analysis in the energy norm are proved. On the other hand, our computational complexity is only $\O(N)$ for $N$ discrete points. We also extend our method to two-dimensional problems.

Keywords: discontinuous coefficients, elliptic equation, jump conditions., interface problem, Tailored finite point method.

Mathematics Subject Classification: Primary: 65N22, 65N35; Secondary: 35J2.

Citation: Zhongyi Huang. Tailored finite point method for the interface problem. Networks & Heterogeneous Media, 2009, 4 (1) : 91-106. doi: 10.3934/nhm.2009.4.91

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