- Email: [email protected]
Measurement techniques for multiphase flows
Flow Measurement and Instrumentation 27 (2012) 1
Contents lists available at SciVerse ScienceDirect
Flow Measurement and Instrumentation journal homepage: www.elsevier.com/locate/flowmeasinst
Editorial
Measurement techniques for multiphase flows Multiphase flows are seen in a wide range of engineering systems and processes. Measurement techniques for multiphase flows are not only of academic interest but also of a diverse range of engineering applications. Despite many decades of effort in developing such techniques, they continue to pose a significant challenge to research scientists and industrial practitioners alike in the field. This special issue contains 15 papers selected from the those presented at the 7th International Symposium on Measurement Techniques for Multiphase Flows (ISMTMF) held in Tianjin in September 2011. The papers have been thoroughly reviewed and modified to take account of the referees comments. Though there are different ways of categorising the selected papers, we have grouped them into three main areas: (1) Optical Techniques. In this area we have papers on the measurement of phase transition of water in microchannel evaporators with a laser photometer (Maikowske et al.), on CO2 bubble local measurement characteristics with photoelectric optical fiber probe (Yamada & Saito), on the measurement of particle size and shape distributions using a CCD camera and multiwavelength laser sources (Gao et al.), on the three-dimensional feature parameters reconstruction for bubbly gas-liquid two-phase flow through the virtual stereo vision (Xue et al.). (2) Process Tomography. The improvement in image reconstruction is, of course, a key problem encountered in industrial process tomography applications. The projected conjugate gradient method for image reconstruction of an ERT system is presented by Wang et al., and an improved method of the Landweber iterative for EMT systems is addressed by Liu et al. The hybrid LS-SVM-BCC algorithm for ECT image reconstruction is dealt with in the paper by Wang et al. The Over-Zero Switching (OZS) scheme in an EIT measurement system is proposed to eliminate the effect of transient time by Jia and Wang. (3) Sensors and Methods. Novel sensor technologies in multiphase flow measurement have attracted a lot attention in
0955-5986/$ – see front matter © 2012 Elsevier Ltd. All rights reserved. doi:10.1016/j.flowmeasinst.2012.08.001
the field in recent years. In this category there are four papers on electrical sensor methods (Huang et al.; Xu et al.; Wang et al.; Huo et al.) and papers on infrared temperature measurement (Pugh and McGlinchey), electrostatic sensor method for particle flow (Li et al.), and an acceleration sensor for the measurement of pipe vibration induced by wet gas flow (Geng et al.). As guest editors we hope that this special issue helps to further developments in the very challenging field of multiphase flow metering. We wish to express our thanks to the authors, the referees and the Organizing Committee of ISMTMF 2011 for their role in bringing this important new information to the special issue of JFMI. This special issue would not have been possible without the support of Professor Jerker Delsing, Editor-in-Chief of JFMI, who stood behind our effort on this special issue on measurement techniques for multiphase flows. We would also like to thank the Journal Manager, Ms. Yamini Narayanan, who has done an excellent job in coordinating the submission and reviews of papers for this special issue. Yong Yan ∗ School of Engineering and Digital Arts, University of Kent, Canterbury, Kent CT2 7NT, UK E-mail address: [email protected]. Ningde Jin School of Electrical Engineering and Automation, Tianjin University, Tianjin, 300072, China E-mail address: [email protected]. ∗ Corresponding editor and Changjiang Scholar Professor at Tianjin
University, China.
Contents lists available at SciVerse ScienceDirect
Flow Measurement and Instrumentation journal homepage: www.elsevier.com/locate/flowmeasinst
Editorial
Measurement techniques for multiphase flows Multiphase flows are seen in a wide range of engineering systems and processes. Measurement techniques for multiphase flows are not only of academic interest but also of a diverse range of engineering applications. Despite many decades of effort in developing such techniques, they continue to pose a significant challenge to research scientists and industrial practitioners alike in the field. This special issue contains 15 papers selected from the those presented at the 7th International Symposium on Measurement Techniques for Multiphase Flows (ISMTMF) held in Tianjin in September 2011. The papers have been thoroughly reviewed and modified to take account of the referees comments. Though there are different ways of categorising the selected papers, we have grouped them into three main areas: (1) Optical Techniques. In this area we have papers on the measurement of phase transition of water in microchannel evaporators with a laser photometer (Maikowske et al.), on CO2 bubble local measurement characteristics with photoelectric optical fiber probe (Yamada & Saito), on the measurement of particle size and shape distributions using a CCD camera and multiwavelength laser sources (Gao et al.), on the three-dimensional feature parameters reconstruction for bubbly gas-liquid two-phase flow through the virtual stereo vision (Xue et al.). (2) Process Tomography. The improvement in image reconstruction is, of course, a key problem encountered in industrial process tomography applications. The projected conjugate gradient method for image reconstruction of an ERT system is presented by Wang et al., and an improved method of the Landweber iterative for EMT systems is addressed by Liu et al. The hybrid LS-SVM-BCC algorithm for ECT image reconstruction is dealt with in the paper by Wang et al. The Over-Zero Switching (OZS) scheme in an EIT measurement system is proposed to eliminate the effect of transient time by Jia and Wang. (3) Sensors and Methods. Novel sensor technologies in multiphase flow measurement have attracted a lot attention in
0955-5986/$ – see front matter © 2012 Elsevier Ltd. All rights reserved. doi:10.1016/j.flowmeasinst.2012.08.001
the field in recent years. In this category there are four papers on electrical sensor methods (Huang et al.; Xu et al.; Wang et al.; Huo et al.) and papers on infrared temperature measurement (Pugh and McGlinchey), electrostatic sensor method for particle flow (Li et al.), and an acceleration sensor for the measurement of pipe vibration induced by wet gas flow (Geng et al.). As guest editors we hope that this special issue helps to further developments in the very challenging field of multiphase flow metering. We wish to express our thanks to the authors, the referees and the Organizing Committee of ISMTMF 2011 for their role in bringing this important new information to the special issue of JFMI. This special issue would not have been possible without the support of Professor Jerker Delsing, Editor-in-Chief of JFMI, who stood behind our effort on this special issue on measurement techniques for multiphase flows. We would also like to thank the Journal Manager, Ms. Yamini Narayanan, who has done an excellent job in coordinating the submission and reviews of papers for this special issue. Yong Yan ∗ School of Engineering and Digital Arts, University of Kent, Canterbury, Kent CT2 7NT, UK E-mail address: [email protected]. Ningde Jin School of Electrical Engineering and Automation, Tianjin University, Tianjin, 300072, China E-mail address: [email protected]. ∗ Corresponding editor and Changjiang Scholar Professor at Tianjin
University, China.