Influence of Non-Magnetic Admixtures to the Signal of Electromagnetic Flow Meter

Pakėnas, Valdas; Virbalis, J. A.

doi:10.5755/j01.eee.116.10.869

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…The limiting cases of ellipsoids are spheres, disks, cylinders, lamella, and others. Some different particular cases are investigated in [10,11]. We generalize all cases for the ellipsoidal shape of particles and any form of a channel with the point electrodes.…”

Section: The Basic Equations Admixture Shapes and Coordinate Systemsmentioning

confidence: 99%

“…With the development of the theory of electromagnetic flow meters, there were considered cases when the liquid is heterogeneous [4][5][6][7][8], but these were partial cases, usually intended at one type of heterogeneity. At Kaunas University of Technology, there were carried out systematic research to correlate the magnitude of measurement errors arising from various types of admixtures with the different physical properties and shape of those admixtures [9][10][11][12]. This chapter of the book summarizes the results obtained by Department of Electrical Power Systems of Kaunas University of Technology.…”

Section: Introductionmentioning

confidence: 99%

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The influence of flow admixtures to the electromagnetic flow meter accuracy

Račkienė,

Virbalis

2024

Boundary Layer Flows - Advances in Experimentation, Modelling and Simulation

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The measurement error appears in an electromagnetic flow meter when the flow has admixtures with magnetic and/or electric properties different from the fluid. The particle shape approximates the ellipsoid. The reasons of error appeared inside and outside of the particles in the active zone of the flow meter with any canal form and turbulent flow investigated. The investigation is performed by analogy among electrostatic, magnetic, and electric current fields. Expressions for error depending on volume concentration, permeability, electric conductivity of particles, and different ellipsoid axes lengths are presented. The expressions of the error are obtained assuming that particles are oriented in various directions concerning the flow direction. Magnetic particles with the considerable value of electric conductivity are dangerous in particular. The extra measurement error depends on particle shape in this case especially. The measurement error increases if the particle shape differs from the sphere. The complementary measurement error can exceed some hundred times the volume concentration of particles if the ratio between the longest and shortest axes of the ellipsoid exceeds 10. The error is proportional to the second power of admixtures volume concentration when particles are nonmagnetic. When admixtures are nonmagnetic and nonconductive, the measurement error does not depend on the particle’s shape.

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Section: The Basic Equations Admixture Shapes and Coordinate Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The influence of flow admixtures to the electromagnetic flow meter accuracy

Račkienė,

Virbalis

2024

Boundary Layer Flows - Advances in Experimentation, Modelling and Simulation

View full text Add to dashboard Cite

show abstract

“…The limiting cases of ellipsoid are sphere, disc, cylinder, lamella, and other. Some different particular cases are investigated in References [15,16]. We generalize all cases for ellipsoidal shape of particles and any form of canal.…”

Section: Global and Local Coordinate Systemsmentioning

confidence: 99%

The Influence of Admixtures to the Signal of an Electromagnetic Flow Meter

Virbalis

Račkienė

Kriuglaitė-Jarašiūnienė

et al. 2019

Energies

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Measurement error in an electromagnetic flow meter appears if magnetic and electric properties of admixtures are different from that of the fluid. Expressions of the error, which depends on volume concentration, permeability, and electric conductivity of particles were obtained by approximating the particles’ shape as an ellipsoid. Components of the error, which appear inside particles and outside particles in active zone of flow meter, with any canal form are investigated. Expressions of the error are presented assuming that particles are oriented in various directions with respect of the flow direction and are spinning. Different cases of magnetic and electric admixtures properties are discussed. Error expression obtained for flows with nonconductive and nonmagnetic particles coincides with experimental and modelling results obtained by other explorers for flows with air bubbles. Magnetic particles with high electric conductivity are especially dangerous. Extra measurement error in this case greatly depends on the shape of the particle. Measurement error increases if particle shape differs from a sphere. The complementary measurement error can exceed the volume concentration of particles by ten times if the ratio between the longest and the shortest axes of ellipsoid exceeds 3.

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Influence of Non-Magnetic Admixtures to the Signal of Electromagnetic Flow Meter

Cited by 2 publications

References 4 publications

The influence of flow admixtures to the electromagnetic flow meter accuracy

The influence of flow admixtures to the electromagnetic flow meter accuracy

The Influence of Admixtures to the Signal of an Electromagnetic Flow Meter

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