New applications for "standard" electrostatic separators

Köhnlechner, Rainer; Dăscălescu, Lucian

doi:10.1109/ias.2005.1518821

Cited by 11 publications

(2 citation statements)

References 4 publications

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“…Successful industrial applications of both roll-and plate-type electrostatic separators are described in the technical literature (Köhnlechner and Dascalescu 2005;Tilmatine et al 2009). Numerical computation of particle trajectory in an electrostatic separator is important because it may pave the way for a thorough analysis of the factors that influence the outcome of the process Dascalescu 2000, 2003;Younes et al 2007).…”

Section: Introductionmentioning

confidence: 98%

Behavior of Conducting Particles in a New Electrostatic Separator with Two High-Voltage Electrodes

Younes¹,

Sayah

Younes

et al. 2010

Particulate Science and Technology

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The objective of this work was to analyze the behavior of good conducting granules in a newly designed plate-type electrostatic separator. Commercial software was employed for the numerical analysis of the electric field generated by an original electrode configuration. This enabled the evaluation of the electric charge and forces on conducting particles. The trajectory of a single particle was calculated over a set of 1300 points. The simulated results show that the trajectories depend on the applied voltage, the radius, and the mass density of the granules. They were found in good agreement with the experiments carried out on a laboratory electrostatic separator.

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Section: Introductionmentioning

confidence: 98%

Behavior of Conducting Particles in a New Electrostatic Separator with Two High-Voltage Electrodes

Younes¹,

Sayah

Younes

et al. 2010

Particulate Science and Technology

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“…"Triboelectric charging" or simply "tribo-charging" is the phenomenon of charge exchange between solid surfaces, such as particles, when brought into contact. Over the years, triboelectric charging found its way to several technical applications, such as electrostatic separation of insulators 1,2 or electrophotography 3 . Aside from its industrial significance, examples of this phenomenon can be encountered in nature.…”

Section: Introductionmentioning

confidence: 99%

Eulerian formulation for the triboelectric charging of polydisperse powder flows

Zeybek,

Grosshans

2021

Preprint

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We propose an Eulerian formulation for the triboelectric charging of powder flows.Recently, continuum descriptions of the charging of monodisperse and bidisperse powder appeared. Now, we propose the first Eulerian formulation for this type of flows that can fully account for polydisperse particle size distributions. To this end, the joint particle size, velocity, and charge distribution function is solved through the direct quadrature method of moments. The newly established approach includes the uptake of electrostatic charge by the particles when contacting a solid wall and the exchange of charge in-between particles during collisions. The electrostatic field induced by the charge of the particles and the drag forces of the surrounding gas affect the particle dynamics. Test cases of two-dimensional steady channel flows demonstrate the charging of the flow from the walls towards the center and in downstream direction. Further, the method predicts the effect of variations of the particle size and initial velocity distribution and the charge diffusion coefficient. The ability to handle polydispersity is a step towards the simulation of the electric charge build-up of real powder flows in full-scale technical applications.

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Eulerian formulation for the triboelectric charging of polydisperse powder flows

Zeybek

Großhans

2021

Physics of Fluids

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We propose an Eulerian formulation for the triboelectric charging of powder flows. Recently, continuum descriptions of the charging of monodisperse and bidisperse powder appeared. Now, we propose the first Eulerian formulation for this type of flows that can fully account for polydisperse particle size distributions. To this end, the joint particle size, velocity, and charge distribution function are solved through the direct quadrature method of moments. The newly established approach includes the uptake of electrostatic charge by the particles when contacting a solid wall and the exchange of charge in-between particles during collisions. The electrostatic field induced by the charge of the particles and the drag forces of the surrounding gas affects the particle dynamics. Test cases of two-dimensional steady channel flows demonstrate the charging of the flow from the walls toward the center and in the downstream direction. Further, the method predicts the effect of variations of the particle size and initial velocity distribution and the charge diffusion coefficient. The ability to handle polydispersity is a step toward the simulation of the electric charge buildup of real powder flows in full-scale technical applications.

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New applications for "standard" electrostatic separators

Cited by 11 publications

References 4 publications

Behavior of Conducting Particles in a New Electrostatic Separator with Two High-Voltage Electrodes

Behavior of Conducting Particles in a New Electrostatic Separator with Two High-Voltage Electrodes

Eulerian formulation for the triboelectric charging of polydisperse powder flows

Eulerian formulation for the triboelectric charging of polydisperse powder flows

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