Series, index and threshold for random 2D composite

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Authors

  • S. Gluzman Department of Computer Sciences and Computer Methods, Pedagogical University, Poland
  • V. Mityushev Department of Computer Sciences and Computer Methods, Pedagogical University, Poland

Abstract

Effective conductivity of a 2D random composite is expressed in the form of long series in the volume fraction of ideally conducting disks. The problem of a direct reconstruction of the critical index for superconductivity from the series is solved with good accuracy, for the first time. General analytical expressions for conductivity in the whole range of concentrations are derived and compared with the regular composite and existing models.

Keywords:

two-dimensional random composite, effective conductivity, critical index, crossover formula