Experimental study of the electrification produced by dispersion of dust into the air

Kamra, A. K. (1973) Experimental study of the electrification produced by dispersion of dust into the air Journal of Applied Physics, 44 (1). pp. 125-131. ISSN 0021-8979

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Official URL: http://link.aip.org/link/?JAPIAU/44/125/1

Related URL: http://dx.doi.org/10.1063/1.1661846

Abstract

Some laboratory experiments have been performed to study the electrification of dust clouds created by blowing different types of dusts into a dust chamber. The polarity and magnitude of the space charge in such dust clouds have been found to be sensitive to the mineral constituents of the dust. Even a single dust cloud, if allowed to settle under gravity in a field-free space with no charge added to it, can have opposite polarities of space charge at different times of its sedimentation. The space charge produced increases with an increase in the length of the surface over which the dust is blown. It also increases with an increase in the temperature and velocity and a decrease in the relative humidity of the blowing air. External electric fields of up to a few hundred V/cm, applied to the surface from which the dust is blown, have little effect on the generated space charge. Size distributions of positively and negatively charged particles show a greater abundance of smaller (~ 3 μ) particles compared to those of small neutral particles.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
ID Code:16338
Deposited On:15 Nov 2010 13:50
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