Optimisation of electrode dimensions of ERT for non-invasive measurement applied for static liquid–gas regime identification

Wahab, Y. Abdul; Rahim, Ruzairi Abdul; Ling, Leow Pei; Rahiman, Mohd Hafiz Fazalul; Aw, Suzanna Ridzuan; Yunus, Fazlul Rahman Mohd; Rahim, Herlina Abdul

doi:10.1016/j.sna.2017.12.017

Cited by 17 publications

(15 citation statements)

References 23 publications

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“…Pedersen et al (2015) conducted experimental studies and proposed an ERT transmitter for online slug detection. A novel multielectrode contactless resistivity array sensor was developed by Wahab et al (2018). The developed system utilized the capacitively coupled contactless conductivity detection technique to take the measurements of the resistance of conductive gasliquid flow.…”

Section: Introductionmentioning

confidence: 99%

Measuring the Taylor Bubble Length in a Two-Phase Flow using an Electrical Resistance Sensor and a High-Speed Camera

2023

JAFM

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The present research aims to investigate the two-phase air/water flow in a vertical pipe using an electrical resistance sensor and a high-speed camera. An electrical resistance sensor is designed and embedded in the inner wall of the tube. A flow pattern map is drawn at the height of 270 cm from the testbed inlet for 320 different phase velocities using a high-speed camera. By measuring the output voltage of the electrical resistance sensor and using the Maxwell relation, the volume fraction in bubbly and slug flow regimes are calculated for different phase velocities. The volume fraction values detected from the output signal of the electrical resistance sensor are compared with the results obtained from the high-speed camera images. The width of the output signal from the electrical resistance sensor indicates the length of the Taylor bubble. The output signal width is compared to the obtained Taylor bubble length from high-speed camera images, for several different velocities of the phases. It is noticed that at a constant velocity of the phases, the output signal width from the sensor is linearly related to the length of the Taylor bubble. The variations of the output signal width are plotted in terms of the ratio of the Taylor bubble length to the summation of air and water superficial velocities. By linear fitting of the available data, a novel equation is presented to calculate the Taylor bubble length in terms of the signal output from the electrical resistance sensor and the total superficial velocity of the phases.

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Section: Introductionmentioning

confidence: 99%

Measuring the Taylor Bubble Length in a Two-Phase Flow using an Electrical Resistance Sensor and a High-Speed Camera

2023

JAFM

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“…21 ERT measurements are used in multiphase flow measurement. [23][24][25][26][27][28][29] The electrodes are typically arranged in a circular array, but for circulating fluidized beds (CFB), the electrodes can be arranged around square cross-sections. 28 The optimum electrode configuration must account for the influence of parameters such as pipe permittivity and pipe wall thickness on the response of the ERT system.…”

Section: Introductionmentioning

confidence: 99%

“…23 Electrode area specified in terms of electrode angle (electrode arc angle) and length is optimized for ERT sensing. 23,24 Guard electrodes have been proposed to improve the evenness of the electric field when the injected electric current flows across the pipe diameter. 27 A conductive ring between the F I G U R E 1 General electrode configurations for ERT.…”

Section: Introductionmentioning

confidence: 99%

“…ERT measurements are used in multiphase flow measurement 23–29 . The electrodes are typically arranged in a circular array, but for circulating fluidized beds (CFB), the electrodes can be arranged around square cross‐sections 28 .…”

Section: Introductionmentioning

confidence: 99%

“…The optimum electrode configuration must account for the influence of parameters such as pipe permittivity and pipe wall thickness on the response of the ERT system 23 . Electrode area specified in terms of electrode angle (electrode arc angle) and length is optimized for ERT sensing 23,24 . Guard electrodes have been proposed to improve the evenness of the electric field when the injected electric current flows across the pipe diameter 27 .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimum reduction of sensing electrodes for delamination identification with electrical resistance tomography

Escalona-Galvis

Venkataraman

2021

Struct Control Health Monit

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Electrical resistance tomography (ERT) is a non-destructive evaluation (NDE)technique that measures the voltages when electric current is injected in a body where damage induced electrical conductivity changes occur. Accurate and efficient damage identification in carbon fiber reinforced polymer (CFRP) composites using ERT requires the optimal selection of the sensing sites. The present work uses an effective independence (EI) measure for selecting the optimally reduced set of measurements among all possible for ERT damage identification. Finite element analyses (FEA) are used to calculate the electrical potential in two CFRP laminate layups with 14 electrodes given a set of specified delamination cases that span the space of possible damage states. Measurement reduction uses two strategies based on individual or group selection about the injection site. A third strategy performs complete electrode exclusion. Inverse identification of delamination cases for the full and the reduced sets after applying the strategies estimates the effectiveness of EI reduction. Results show the lowest errors come from individual measurement elimination. Electrode elimination is attainable with acceptable accuracy loss. This work shows that the EI measure optimally reduces electrode and electrode combinations in ERT-based damage identification.

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Initial Study of Multiple Excitation Source for Electrical Resistance Tomography in Steel Pipe Application

Wahab

Syakyean

Zain

et al. 2019

Proceedings of the 10th National Technical Seminar on Underwater System Technology 2018

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Optimisation of electrode dimensions of ERT for non-invasive measurement applied for static liquid–gas regime identification

Cited by 17 publications

References 23 publications

Measuring the Taylor Bubble Length in a Two-Phase Flow using an Electrical Resistance Sensor and a High-Speed Camera

Measuring the Taylor Bubble Length in a Two-Phase Flow using an Electrical Resistance Sensor and a High-Speed Camera

Optimum reduction of sensing electrodes for delamination identification with electrical resistance tomography

Initial Study of Multiple Excitation Source for Electrical Resistance Tomography in Steel Pipe Application

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