Efficient calculation of transient eddy current response from multilayer cylindrical conductive media

TL;DR

This paper presents improved methods for efficiently calculating the transient eddy current response in multilayer cylindrical conductive media, applicable to well logging and eddy current testing, by combining domain truncation, novel layer treatment, and Laplace inversion techniques.

Contribution

It introduces novel computational techniques that enhance efficiency and stability in modeling transient eddy currents in multilayer cylindrical structures.

Findings

Enhanced computational efficiency for transient response calculations.

Stable modeling of multiple layers without overflow issues.

Effective short- and long-time transient response analysis.

Abstract

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'.