@inproceedings{scholars8925,
           title = {Sinusoid based calibration for holdup measurement in two-phase flow using helical capacitance sensor},
         journal = {International Conference on Intelligent and Advanced Systems, ICIAS 2016},
       publisher = {Institute of Electrical and Electronics Engineers Inc.},
            note = {cited By 1; Conference of 6th International Conference on Intelligent and Advanced Systems, ICIAS 2016 ; Conference Date: 15 August 2016 Through 17 August 2016; Conference Code:125970},
             doi = {10.1109/ICIAS.2016.7824103},
            year = {2017},
        abstract = {A helical capacitance sensor was designed to measure the holdup of two-phase stratified flow in horizontal pipe. The structure of 360{\^A}o twisted helical capacitance sensor had been designed, analyzed and optimized using finite element method. A sinusoidal function was observed as the relationship between the capacitance readings and holdup. As the nonhomogeneity in the distribution of capacitance sensitivity field cannot be completely eliminated, a helical capacitance sensor was designed in such a way that a sinusoidal relationship was generated. The numerical readings and the approximation model obtained a very close agreement, where the mean absolute difference was about {\^A}{$\pm$}1. Besides, the effects of geometric parameters on the capacitance values were analyzed and investigated, where it was found that the symmetry of sinusoidal function can be modeled by adjusting the pitch of helix. {\^A}{\copyright} 2016 IEEE.},
        keywords = {Capacitance; Finite element method, Approximation model; Capacitance sensors; holdup; Mean absolute differences; Sinusoidal; Sinusoidal functions; stratified; Two-phase stratified flows, Two phase flow},
             url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85012024091&doi=10.1109\%2fICIAS.2016.7824103&partnerID=40&md5=ed48c238178998b5ef6399268e01ff9d},
            isbn = {9781509008452},
          author = {Lim, L. G. and Tang, T. B. and Hamid, N. H. and Pao, W. K. S.}
}