Electrical resistance imaging of two-phase flow using direct Landweber method

In this paper, a direct Landweber method is proposed to estimate on-line resistivity distribution of two-phase flows using electrical resistance tomography. The proposed method is formulated such that the iterative Landweber method is modified for on-line computation and the resistivity distribution...

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Bibliographic Details
Published in:Flow measurement and instrumentation 2015-03, Vol.41, p.41-49
Main Authors: Kim, Bong Seok, Khambampati, Anil Kumar, Kim, Sin, Kim, Kyung Youn
Format: Article
Language:English
Subjects:
Electrical resistance tomography
Image reconstruction
Landweber method
On-line monitoring
Two-phase flow
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Summary:In this paper, a direct Landweber method is proposed to estimate on-line resistivity distribution of two-phase flows using electrical resistance tomography. The proposed method is formulated such that the iterative Landweber method is modified for on-line computation and the resistivity distribution is estimated directly by multiplying the measured data with a weighting matrix that is computed off-line. Moreover, to improve the reconstruction performance, adaptive step-lengths for the proposed method are computed. Numerical simulations and phantom experiments have been carried out to evaluate the performance of the proposed method. •A direct Landweber method is proposed to estimate on-line resistivity distribution of two-phase flows.•Appropriate step-lengths are computed based on initial guess and objective function.•The proposed method is formulated by modifying iterative Landweber method for application to on-line estimation.•Singular value decomposition method is used to reduce off-line computational time.
ISSN:0955-5986
1873-6998
DOI:10.1016/j.flowmeasinst.2014.10.015