Effects of Polarization on Particle-Laden Flows

Kolehmainen, Jari; Özel, Ali; Gu, Yile; Shinbrot, Troy; Sundaresan, Sankaran

doi:10.1103/physrevlett.121.124503

Cited by 19 publications

(21 citation statements)

References 44 publications

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“…Alternatively, and can be non-dimensionalized as the ratio of the Coulombic to gravitational forces (Kolehmainen et al. 2018), . In the definition of and the reference length scale is the distance between the centres of two particles assuming a uniform distribution in the domain.…”

Section: Resultsmentioning

confidence: 99%

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The effect of electrostatic charges on particle-laden duct flows

et al. 2020

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Section: Resultsmentioning

confidence: 99%

“…Therein, τ el was derived as 2(πεm p /(ρ N Q 2 )) 1/2 . Alternatively, Q and ρ N can be non-dimensionalized as the ratio of the Coulombic to gravitational forces (Kolehmainen et al 2018)…”

Section: Numerical Set-upmentioning

confidence: 99%

The effect of electrostatic charges on particle-laden duct flows

et al. 2020

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“…Due to the charge, attractive and repulsive forces can result in segregation or agglomeration of particles, respectively, and therefore reduced contact numbers of particles. To understand the segregation or agglomeration of particles caused by triboelectric charging, several experimental and simulative studies were carried out [46][47][48][49]. However, in order to be able to apply the suggested models for calculating the contact number by electrostatic forces, the particle size-dependent charge distribution must be known, or the segregation or agglomeration within the charging section has to be determined.…”

Section: Particle Interaction Parametermentioning

confidence: 99%

“…The determination of the segregation or agglomeration of particles within the charging tube for particles below 40 µm and flow velocity of 10 m s −1 is also challenging. In addition, agglomeration of particles due to electrostatic force is only investigated for very low gas velocities [47], and no agglomeration of particles was found in within same experimental conditions [50]. Therefore, electrostatic interaction is excluded for the estimation of contact number.…”

Section: Particle Interaction Parametermentioning

confidence: 99%

Influence of Particle Contact Number on Triboelectric Separation Selectivity

Landauer

Foerst

2019

Processes

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Triboelectric separation is a promising technology to separate fine powders. To enable triboelectric separation for its application in industry, the impact of the process and product parameters must be examined. In this study, with regards to different wall materials in the charging step (PTFE, POM, PE, PVC, and PMMA), the influence of the powder composition of a binary starch-protein mixture with a protein content of 15 wt.%, 30 wt.% and 45 wt.% was studied. By increasing the protein content in the feed, the separation selectivity increased. No dependency of the empirical triboelectric series was determined for all powder compositions. The variation in the protein content of the initial powder and turbulent flow profiles results in a variation in the contact number of particles calculated. An increase in the contact number of particles leads to an increase in the protein content separated on the cathode, whereas the protein content on the anode is only slightly affected. These findings underpin the assumption that particle-particle interaction plays a decisive role in triboelectric charging of fine powders.

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“…The electrostatic interactions are of interest in the present study. Particles suspended in turbulent flows usually carry electrical charge through triboelectrification or the sticking of free ions to the surface (Jones 1995;McCarty & Whitesides 2008;Pähtz, Herr,amm & Shinbrot 2010;Kolehmainen et al 2018). Such systems can be found in the particle-laden flue gas in electrostatic precipitators (Jaworek et al 2018), the sandstorms and dust devils on Earth or Mars (Di Renzo & Urzay 2018; Zhang & Zhou 2020) and the plumes after volcanic eruptions (Gilbert et al 1991).…”

Section: Introductionmentioning

confidence: 99%