Asymptotic analysis of an array of closely spaced absolutely conductive inclusions

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September 2006, 1(3): 353-377. doi: 10.3934/nhm.2006.1.353

Asymptotic analysis of an array of closely spaced absolutely conductive inclusions

Leonid Berlyand ^1, , Giuseppe Cardone ^2, , Yuliya Gorb ^3, and Gregory Panasenko ^4,

1.	Department of Mathematics and Materials Research Institute, Penn State University, University Park, PA 16802, United States
2.	Department of Engineering–University of Sannio, Benevento, Italy
3.	Department of Mathematics, Pennsylvania State University, University Park, PA 16802, United States
4.	LaMUSE–University Jean Monnet, Saint Etienne, France

Received February 2006 Revised June 2006 Published July 2006

Abstract
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We consider the conductivity problem in an array structure with square closely spaced absolutely conductive inclusions of the high concentration, i.e. the concentration of inclusions is assumed to be close to 1. The problem depends on two small parameters: $\varepsilon$, the ratio of the period of the micro-structure to the characteristic macroscopic size, and $\delta$, the ratio of the thickness of the strips of the array structure and the period of the micro-structure. The complete asymptotic expansion of the solution to problem is constructed and justified as both $\varepsilon$ and $\delta$ tend to zero. This asymptotic expansion is uniform with respect to $\varepsilon$ and $\delta$ in the area $\{\varepsilon=O(\delta^{\alpha}),~\delta =O(\varepsilon^{\beta})\}$ for any positive $\alpha, \beta.$

Keywords: two small parameters, asymptotic expansion, array structure, boundary layer., Homogenization.

Mathematics Subject Classification: Primary: 34E05, 35C20; Secondary: 78M3.

Citation: Leonid Berlyand, Giuseppe Cardone, Yuliya Gorb, Gregory Panasenko. Asymptotic analysis of an array of closely spaced absolutely conductive inclusions. Networks & Heterogeneous Media, 2006, 1 (3) : 353-377. doi: 10.3934/nhm.2006.1.353

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