Asymptotics of the solution to the conductivity equation in the presence of adjacent circular inclusions with finite conductivities

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We consider the conductivity problem in the presence of adjacent circular inclusions with constant conductivities. When two inclusions get closer and their conductivities degenerate to zero or infinity, the gradient of the solution can be arbitrary large. In this paper we derive an asymptotic formula of the solution, which characterizes the gradient blow-up of the solution in terms of conductivities of inclusions as well as the distance between inclusions. The asymptotic formula is expressed in bipolar coordinates in terms of the Lerch transcendent function, and it is valid for inclusions with arbitrary constant conductivities. We illustrate our results with numerical calculations.
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Issue Date
2015-01
Language
English
Article Type
Article
Citation

JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS, v.421, no.1, pp.131 - 156

ISSN
0022-247X
DOI
10.1016/j.jmaa.2014.07.002
URI
http://hdl.handle.net/10203/195804
Appears in Collection
MA-Journal Papers(저널논문)
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