Finite-Element Modeling of Electrostatic Sensors for the Flow Measurement of Particles in Pneumatic Pipelines

• Published in: IEEE transactions on instrumentation and measurement Vol. 58; no. 8; pp. 2730 - 2736
• Main Authors: Krabicka, J., Yong Yan
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.08.2009; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: 01 COAL, LIGNITE, AND PEAT; Atmospheric modeling; ELECTRIC CHARGES; Electrode; ELECTRODES; Electrostatic measurements; electrostatic sensors; ELECTROSTATICS; FINITE ELEMENT METHOD; Finite element methods; finite-element modeling (FEM); Flow measurement; FLOW MODELS; FLOW RATE; Mathematical analysis; Mathematical models; MEASURING METHODS; Optical attenuators; Particle measurements; PIPELINES; pneumatic conveying; PNEUMATIC TRANSPORT; Power generation; pulverized fuel; PULVERIZED FUELS; SENSORS; Solids; two-phase flow; Ultrasonic variables measurement
• ISSN: 0018-9456; 1557-9662
• DOI: 10.1109/TIM.2009.2016288

Electrostatic sensors are used in certain industries for the flow measurement of pneumatically conveyed solids. However, despite various advances that have been made in recent years, relatively little information is known about the exact nature of the electrostatic charge induced onto the sensor electrode due to moving particles, which is dependent on electrode geometry, particle distribution, and particle velocity. This paper presents a novel approach to the study of the charge induced onto electrostatic sensors based on fitting a Lorentzian curve to the results of a finite-element model of the electrostatic sensor and pipeline. The modeling method is validated by comparing the modeling results of a nonintrusive circular electrode with an established analytical solution. The modeling results are used for in-depth analysis and informed design of a particular sensor configuration.