Numerical Simulation Modelling for Velocity Measurement of Electromagnetic Flow Meter

An induced voltage 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 an electrical conductor, Electrical capacitance and resistance tomography has bee...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 48; no. 1; pp. 36 - 40
Main Authors Wang, J Z, Gong, C L, Tian, G Y, Lucas, G P
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.10.2006
Subjects
Conductors
Electric conductors
Electromagnetic induction
Flow velocity
Induced voltage
Industrial areas
Mathematical models
Multiphase flow
Phase velocity
Physics
Profile measurement
Simulation
Single-phase flow
Velocity
Velocity distribution
Velocity measurement
Voltage drop
Weighting functions
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Summary:An induced voltage 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 an electrical conductor, Electrical capacitance and resistance tomography has been comprehensively investigated, except for continuous phase velocity profile measurement. This paper tries to design the numerical simulation model according to the basic electromagnetic induction law and to investigate the relationship between induced electric potential or potential drop and the velocity distribution of the conductive continuous phase in the flow. First, the 3-Dimenssion simulating module for EMF is built. Given the most simple velocity profile of the fluid in the pipe, the value of the induced potential difference between electrodes is obtained by simulation and theoretical computation according to J A Shercliff's weight function. The relative error is 6.066 . This proves that the simulation model is accurate enough to investigate the characteristic of the induced potential difference of EMF. Finally, the relationship between induced potential difference and the velocity profile is analysed in detail where the complicated velocity profile is expressed as vz 1m/s when 0.022<x2+y2< 0.02652 and vz 5m/s when x2+y2< 0.022.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/48/1/007