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Coupled axial–radial segregation in rotating drums with high fill levels
Author(s) -
Kuo H. P.,
Shih P. Y.,
Hsu R. C.
Publication year - 2006
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.10866
Subject(s) - drum , core (optical fiber) , mechanics , rotational speed , geometry , physics , engineering , classical mechanics , optics , mechanical engineering , mathematics
Axial segregation and radial segregation within the granular bed in a rotating drum with a fill level > 50% were experimentally investigated. The axial segregated patterns and the radial segregated patterns were coupled within the bed, resulting in observation of new segregated patterns at the plane along the rotational shaft. The segregated patterns are different from the previous axial band and radial core patterns and show coupled new patterns, including the “cross” patterns, the “band‐core‐in‐core” patterns, and other geometric patterns. The new segregation patterns are strong functions of the fill level and the rotational speed of the drum. The formation of the axial–radial coupled patterns was attributed to the fill level, the free flowing surface of the bed. A virtual drum hypothesis is proposed to explain the formation of the complex segregated patterns. © 2006 American Institute of Chemical Engineers AIChE J, 2006