4.5 Article

Efficient calculation of transient eddy current response from multi-layer cylindrical conductive media

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ROYAL SOC
DOI: 10.1098/rsta.2019.0588

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eddy current testing; well logging; cylindrical media; transient voltage calculation; time response; Laplace transform inversion

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The transient response from a transmitter-receiver coil system inside a multi-layer cylindrical conductive configuration is obtained. The particular set-up applies to well logging as well as to eddy current tube testing. In this work, a number of improvements are presented to existing models for an efficient calculation of the induced voltage. These include: domain truncation, novel treatment of arbitrary number of layers in order to avoid computational overflows and efficient time response calculation. The latter is based on a combination of Laplace inversion techniques for short- and long-time transient responses. This article is part of the theme issue 'Advanced electromagnetic non-destructive evaluation and smart monitoring'.

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