Electrostatic charging phenomenon in gas–liquid–solid flow systems

Park, Ah‐Hyung Alissa; Fan, Liang‐Shih

doi:10.1016/j.ces.2006.08.058

Cited by 23 publications

(2 citation statements)

References 21 publications

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“…Comprehensively considering the sensitivity distribution and the available information number of the ESA, the sensing domain of the ESA is mapped onto 13 pixels of equal area, as shown in figure 3. In figure 3, the 13 pixels can be classified into the sensitive pixels (6,7,8,9,10,11,12,13), subsensitive pixels (2, 3, 4, 5) and nonsensitive pixel (1). This meshing method of pixels is helpful in analyzing the effect of sensitivity distribution on velocity measurement.…”

Section: Velocity Measurement Principlementioning

confidence: 99%

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Particle velocity measurement method of dense-phase gas–solid flow based on an electrostatic sensor array

Gao¹,

Chang²,

Wang³

2019

Meas. Sci. Technol.

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Particle velocity is an important parameter of dense-phase gas–solid flow for both monitoring and control purposes. This paper presents a recent development in the noncontact measurement of solid particle velocity using an electrostatic sensor array (ESA). The electrostatic sensor array with eight electrodes is used to collect electrostatic signals generated by the moving charged particles. A velocity measurement method based on the tomography technique is presented, which measures the velocity of solid particles in the horizontal pipeline. The simulated model of the ESA with eight electrodes is built, and the sensing area of the ESA is mapped onto 13 pixels of equal area. Simulation tests are then conducted to evaluate the feasibility and accuracy of the velocity measurement at different positions. Finally, experimental tests are conducted on the horizontal conveying pipeline of a high- pressure dense-phase pneumatic conveying pilot system. Results indicate that the proposed method is capable of measuring the spatial average velocity of pulverized coal over the cross-sectional area of pipe with a relative error within ±7% for the conditions of particles tending to be of uniform distribution. In addition, the effect of moisture on velocity measurement is investigated.

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Section: Velocity Measurement Principlementioning

confidence: 99%

“…Particle charging is a common phenomenon in gas-solid flow, which is mainly caused by the interaction, contact and collision between particle and particle, particle and gas, and particle and pipe wall [8][9][10]. The charged particles flow in the pipeline and generate 'electrostatic noise'.…”

Section: Introductionmentioning

confidence: 99%

Particle velocity measurement method of dense-phase gas–solid flow based on an electrostatic sensor array

Gao¹,

Chang²,

Wang³

2019

Meas. Sci. Technol.

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Electroneutrality: When and Where?

Galembeck

Burgo

2017

Chemical Electrostatics

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Triboelectrification Electrostatic Potential of MC Nylon 6 under Point Contact Dry Sliding

et al. 2009

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The triboelectrification electrostatic potential of MC nylon 6 and its influence factors have not been investigated to date. Here, we report on our study of the interaction of tribological behaviors and triboelectrification electrostatic potential for the prevention or application of triboelectrification. The equipment we used to polymerize insulation materials and for instantaneously monitoring the dynamic variations of triboelectrification electrostatic potential, friction coefficient, and temperature at the tribointerface was self-designed. The dynamic variations in the triboelectrification electrostatic potential of the polymer insulation materials under dry sliding were investigated using this equipment. An obvious influence on magnitude and change tendency of the triboelectrification electrostatic potential of MC nylon 6 could be produced only when the combined action of load (P) and speed (V) made PV values reach a certain degree. After MC nylon 6 rubbing against the bearing steel, the triboelectrification electrostatic potential of MC nylon 6 was not constant, and it could even abruptly drop from hundreds of volts to 0, especially under severe sliding conditions. A positive charge existed on the tribo-surface of MC nylon 6 and a negative charge existed on the tribo-surface of the counterpart steel. During the severe wear process, the experimental conditions, wear rate, the formation of transfer film, and the fraction of film on the counterpart as well as frictional heat were the most significant interaction effects on the abrupt change in the triboelectrification electrostatic potential among all factors studied. The interaction of tribological behaviors and triboelectrification electrostatic potential was clearly not a simple physical mechanism, which might be influenced by the external conditions and internal integration.

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Electrostatic charging phenomenon in gas–liquid–solid flow systems

Cited by 23 publications

References 21 publications

Particle velocity measurement method of dense-phase gas–solid flow based on an electrostatic sensor array

Particle velocity measurement method of dense-phase gas–solid flow based on an electrostatic sensor array

Electroneutrality: When and Where?

Triboelectrification Electrostatic Potential of MC Nylon 6 under Point Contact Dry Sliding

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