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2016 | OriginalPaper | Chapter

6. Green Function of the Point Source Inside/Outside Spherical Domain - Approximate Solution

Authors : Nenad Cvetković, Miodrag Stojanović, Dejan Jovanović, Aleksa Ristić, Dragan Vučković, Dejan Krstić

Published in: Engineering Mathematics I

Publisher: Springer International Publishing

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Abstract

A brief review of derivation of two groups of approximate closed form expressions for the electrical scalar potential (ESP) Green functions that originates from the current of the point ground electrode (PGE) in the presence of a spherical ground inhomogeneity are presented in this paper. The PGE is fed by a very low frequency periodic current through a thin isolated conductor. One of approximate solutions is proposed in this paper. Known exact solutions that have parts in a form of infinite series sums are also given in this paper. In this paper, the exact solution is solely reorganized in order to facilitate comparison to the closed form solutions, and to estimate the error introduced by the approximate solutions. Finally, error estimation is performed comparing the results for the electrical scalar potential obtained applying the approximate expressions and the accurate calculations. This is illustrated by a number of numerical experiments.

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Metadata
Title
Green Function of the Point Source Inside/Outside Spherical Domain - Approximate Solution
Authors
Nenad Cvetković
Miodrag Stojanović
Dejan Jovanović
Aleksa Ristić
Dragan Vučković
Dejan Krstić
Copyright Year
2016
DOI
https://doi.org/10.1007/978-3-319-42082-0_6

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