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http://dx.doi.org/10.17702/jai.2013.14.4.183

A Study on Heaping of Granules  

Han, Ji Heum (Department of Science, Sehwa high school)
Han, Won Heum (Department of Physics, Korea University)
Lee, Kwang-Hee (Department of Science, Sehwa high school)
Publication Information
Journal of Adhesion and Interface / v.14, no.4, 2013 , pp. 183-191 More about this Journal
Abstract
In order to elucidate the granular heaping phenomenon, the movement behaviors of 3 different types of granule (millet, sand and thin foil disc) have been investigated by applying the vertical or the rotational vibration to each of the 3 vessels, respectively containing one of the 3 types of granule. In case of vertical vibrations, all of them showed the heaping phenomenon like Gerner's simulation, and that in the order of the millet, sand and thin foil disc, regardlessly of weight. Especially, a heaping of disc granules was proven to be relatively delayed, and that with several small complex clutters. For rotational vibration, the central area of vessel turned out to rise up due to the repulsive force by vessel wall as well as the collision between elastic granules, right after the turning point of vibration. Even spiral pattern was made when the rotational vibration amplitude got higher. From these facts, one can see that the heaping be characterized by the inclusion of attractive granules as well as the vibrational type applied to granule vessel.
Keywords
faraday heaping; newtonian force; stokesian force; air drag; granular dynamics;
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