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Separating polydisperse particles using electrostatic precipitators with wire and spiked-wire discharge electrode design
[Display omitted] •Numerical simulation of electrostatic precipitators with electric wind was performed.•Particle density and permittivity affected precipitation for submicron and micron sized particles.•Influence of electrode design on separation efficiency was discussed. Numerical simulations of e...
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Published in: | Particuology 2018-06, Vol.38, p.10-17 |
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Main Authors: | , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | [Display omitted]
•Numerical simulation of electrostatic precipitators with electric wind was performed.•Particle density and permittivity affected precipitation for submicron and micron sized particles.•Influence of electrode design on separation efficiency was discussed.
Numerical simulations of electrostatic precipitators featuring wire and spiked electrode designs were performed to determine particle behavior and separation efficiency. The applied-voltage mechanism that alters the flow structure of particles through ionic winds and mean electric fields are revealed. Numerical studies throughout the past years have shown these structures for channel and pipe configurations. However, less attention was given to field averaging for the ni,∞t-product and electric field. Our study focuses on this averaging and illustrates relevant differences between multidimensional setups concerning these fields. Turbulence was modeled using the Reynolds-averaged Navier–Stokes equations with a second-order Reynolds-stress-model closure. A high three-dimensionality of the ionic wind-induced turbulence is presented. This leads to an increase in the submicron-particle precipitation rate. The results confirm the dependence of separation efficiency on particle density and permittivity, thereby showing the advantages of spiked wires compared with wire-plate setups used in electrostatic precipitators. |
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ISSN: | 1674-2001 2210-4291 |
DOI: | 10.1016/j.partic.2017.05.014 |