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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/15958

Title: Field and electric potential of conductors with fractal geometry
Other Titles: Journal of Physics: Condensed Matter
Authors: Assis, Thiago Albuquerque de
Mota, Fernando de B.
Miranda, José Garcia Vivas
Andrade, Roberto Fernandes Silva
Castilho, Caio Mário Castro de
Issue Date: 2007
Abstract: In this study, the behavior of the electric field and its potential are investigated in a region bounded by a rough fractal surface and a distant plane. Both boundaries, maintained at distinct potential values, are assumed to be conductors and, as such, the electric potential is obtained by numerically solving Laplace's equation subject to the appropriate Dirichlet's condition. The rough boundaries, generated by the ballistic deposition and fractal Brownian motion methods, are characterized by the values of the surface roughness W and the local fractal dimension df = 3−α, where α is the usual roughness exponent. The equipotential surfaces, obtained from Laplace's equation, are characterized by these same parameters. Results presented show how df depends on the potential value, on the method used to generate the boundary and on W. The behavior of the electric field with respect to the equipotential surface is also considered. Its average intensity was found to increase as a function of the average distance from the equipotential to the fractal boundary; however, its intensity reaches a maximum before decreasing towards an asymptotic constant value, an effect that increases as the value of W increases.
Description: Texto completo: acesso restrito. p. 1-12
URI: http://repositorio.ufba.br/ri/handle/ri/15958
ISSN: 0953-8984
Appears in Collections:Artigos Publicados em Periódicos (FIS)

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