Resolução numérica de equações de transporte de cargas elétricas através de isolantes / Numerical solutions of equations describing electric charge transport through insulating materials

AUTOR(ES)

Mariangela Tassinari de Figueiredo

DATA DE PUBLICAÇÃO

1988

RESUMO

Numeral methods for solving partial differential equations of the hiperbolic type, governing some problems of transport of electric charge in dielectrics are presented and then applied to four specific problems: injection of charge via an ohmic contact into a sample with a constant applied voltage; transport of a pulse of charge through a sample in the open circuit mode; transport of a pulse of charge through a sample subjected to a constant voltage; and finally, thermally stimulated discharge in open circuit. Essentially two kinds of methods are employed: the method of characteristics and finite-difference methods. It is concluded that when discontinuities are important, the method of characteristics is the most convenient; otherwise, appropriate finite-difference schemes can be used with sufficient precision and less time expenses in computers.

ASSUNTO(S)

charge transport método das diferenças finitas carga espacial isolantes space charge transporte de cargas insulating materials método das características finite difference method characteristics method

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