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Sensors 2016, 16(7), 1032; doi:10.3390/s16071032

Design of Helical Capacitance Sensor for Holdup Measurement in Two-Phase Stratified Flow: A Sinusoidal Function Approach

1
Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar 32610, Malaysia
2
Department of Mechanical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar 32610, Malaysia
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 3 June 2016 / Revised: 30 June 2016 / Accepted: 30 June 2016 / Published: 4 July 2016
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [4580 KB, uploaded 6 July 2016]   |  

Abstract

A 360° twisted helical capacitance sensor was developed for holdup measurement in horizontal two-phase stratified flow. Instead of suppressing nonlinear response, the sensor was optimized in such a way that a ‘sine-like’ function was displayed on top of the linear function. This concept of design had been implemented and verified in both software and hardware. A good agreement was achieved between the finite element model of proposed design and the approximation model (pure sinusoidal function), with a maximum difference of ±1.2%. In addition, the design parameters of the sensor were analysed and investigated. It was found that the error in symmetry of the sinusoidal function could be minimized by adjusting the pitch of helix. The experiments of air-water and oil-water stratified flows were carried out and validated the sinusoidal relationship with a maximum difference of ±1.2% and ±1.3% for the range of water holdup from 0.15 to 0.85. The proposed design concept therefore may pose a promising alternative for the optimization of capacitance sensor design. View Full-Text
Keywords: helical capacitance sensor; finite element method; two-phase flow; stratified flow; holdup measurement; sinusoidal helical capacitance sensor; finite element method; two-phase flow; stratified flow; holdup measurement; sinusoidal
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Lim, L.G.; Pao, W.K.S.; Hamid, N.H.; Tang, T.B. Design of Helical Capacitance Sensor for Holdup Measurement in Two-Phase Stratified Flow: A Sinusoidal Function Approach. Sensors 2016, 16, 1032.

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