Nanofluidization electrostatics.

Nanofluidization electrostatics. Research Abstract Details 

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Nanofluidization electrostatics. Abstract Text:

Electrostatic charging of powders is a relevant phenomenon for a number of industrial applications. The design of new processes and the use of high resistivity materials and ultrafine powders may lead to higher charging rates and to higher levels of charge accumulation that can become a serious problem. In this work we investigate experimentally electrostatic charging in nanofluidization. The behavior of a fluidized bed of silica nanoparticles under the influence of an electrostatic field is studied. The electric field is applied in the horizontal direction and perpendicular to the gas flow. On one hand, we observe the influence of the electric field on the bulk behavior of the fluidized bed, which suffers a collapse when the electric field is turned on. For strong electric fields the stationary state of the fluidized bed reminds one of that of a spouted bed, with a solid layer adhered to the wall and a low density core region of local high gas velocity. On the other hand, and in order to gain additional insight, we look at the trajectories of nanoparticle agglomerates as affected by the electric field. This images analysis reveals that these agglomerates are horizontally deflected towards the wall as a consequence of being charged. From the analysis of agglomerate trajectories the charge per agglomerate is estimated. Using these measurements the electrostatic forces between agglomerates are calculated and compared to van der Waals attractive forces.

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Nanofluidization electrostatics. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Physical review. E, Statistical, nonlinear, and so

VOLUME: 77

Page Numbers: 031301

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ISSN: 1539-3755

DAY: 12

MONTH: 03

YEAR: 2008

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LANGUAGE: eng

NlmUniqueID: 101136452

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Grant and Affiliation Information for Nanofluidization electrostatics.

AFFILIATION: Faculty of Physics, University of Seville, Avenida Reina Mercedes s/n, 41012 Seville, Spain.

Country: United States

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MEDLINETA: Phys Rev E Stat Nonlin Soft Ma

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