Investigation of electrostatic charge distribution in gas–solid fluidized beds

Sowinski, Andrew; Miller, L.W.; Mehrani, Poupak

doi:10.1016/j.ces.2010.01.008

Cited by 103 publications

(61 citation statements)

References 25 publications

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“…This size dependence has been best demonstrated in laboratory experiments involving sand cascading Kok and Lacks 2009;Lacks and Levandovsky 2007, Forward et al 2009a, 2009bBilici et al 2014). However, not all experimental studies reproduce this behaviour (Trigwell et al 2003;Sowinski et al 2010;Kunkel 1950). It should also be noted that in many of these electrification studies multiple particle interactions are involved, including particle-wall interactions , and material purity (surface composition) is not well controlled.…”

Section: Particulate Size Dependencementioning

confidence: 99%

Applications of Electrified Dust and Dust Devil Electrodynamics to Martian Atmospheric Electricity

et al. 2016

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Atmospheric transport and suspension of dust frequently brings electrification, which may be substantial. Electric fields of 10 kV m −1 to 100 kV m −1 have been observed at the surface beneath suspended dust in the terrestrial atmosphere, and some electrification has been observed to persist in dust at levels to 5 km, as well as in volcanic plumes. The interaction between individual particles which causes the electrification is incompletely understood, and multiple processes are thought to be acting. A variation in particle charge with particle size, and the effect of gravitational separation explains to, some extent, the charge structures observed in terrestrial dust storms. More extensive flow-based modelling demonstrates that bulk electric fields in excess of 10 kV m −1 can be obtained rapidly (in less than 10 s) from rotating dust systems (dust devils) and that terrestrial breakdown fields can be obtained. Modelled profiles of electrical conductivity in the Martian atmosphere suggest the possibility of dust electrification, and dust devils have been suggested as a mechanism of charge separation able to maintain current flow between one region of the atmosphere and another, through a global circuit. Fundamental new understanding of Martian atmospheric electricity will result from the ExoMars mission, which carries the DREAMS (Dust characterization, Risk Assessment, and Environment Analyser on the Martian Surface)-B R.G. Harrison

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Section: Particulate Size Dependencementioning

confidence: 99%

Applications of Electrified Dust and Dust Devil Electrodynamics to Martian Atmospheric Electricity

et al. 2016

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“…The details of the measurement technique are not described here and can be found in [2]. The bulk charge measured before fluidization is predominantly negative for all experimental runs.…”

Section: Resultsmentioning

confidence: 99%

“…For more details, refer to Sowinski et al [2]. A schematic diagram of the experimental set-up is shown in Figure 3 …”

Section: Experimental Set Upmentioning

confidence: 99%

“…The mean particle size in each group is reasonably close in all the experiments, but the charge measurements have an error bar with variation of more than ten percent [2]. To study the sensitivity of the electrostatic model two cases are simulated.…”

Section: Model Sensitivity Studymentioning

confidence: 99%

“…Sowinksi et al [2,54] used an online Faraday cup technique to measure the electrostatic charge of the particles in their entirety using a lab-scale gas-solid fluidized-bed. The system was operated with dry air and with a wide size distribution of commercially produced polyethylene particles.…”

Section: Electrostatic Model Validationmentioning

confidence: 99%

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