Abstract
An induced voltage Electromagnetic Flow meter (EMF) in the area of measuring single phase flow rate in pipes has been used in many industrial areas. To measure the continuous phase velocity profile in multiphase flows where the continuous phase is electrical conductive, Electrical capacitance and resistance tomography has been comprehensively investigated, except for continuous phase velocity profile measurement. This paper tries to investigate the relationship between induced electric potential or potential drop and the velocity distribution of the conductive continuous phase in the flow pipe with Electromagnetic inductance tomography (EMT). This methodology will have impact on evaluation of multiphase flow profile. In the investigation of the characteristics of an electromagnetic flow meter in multiphase flow, the geometry and physical model of alternating current electromagnetic flow meter, was designed and simulated. Multiple electrodes could be arranged at any position of the circumference to meet the requirement of signals picking for induced potential. The induced electric potential or potential drop signals from the flow meter under various flow conditions were obtained and analyzed. The numerical simulation result indicated that the methodology of EMT would be an effective novel method to obtain the volumetric flow rate.
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