Relation between Segregation Pattern and Flow Mode in Rotating Conical Drum
نویسندگان
چکیده
منابع مشابه
Segregation pattern competition in a thin rotating drum.
Results are presented of an experimental investigation into patterned size segregation of binary granular mixtures in a thin rotating drum that is half full. It is observed that streaks of small particles are formed within regions of large ones where the integer number of streaks is fixed over a range of rotation rate of the drum. Different patterns form in adjacent parameter ranges and the dyn...
متن کاملSimulated three-component granular segregation in a rotating drum.
Discrete particle simulations are used to model segregation in granular mixtures of three different particle species in a horizontal rotating drum. Axial band formation is observed, with medium-size particles tending to be located between alternating bands of big and small particles. Partial radial segregation also appears; it precedes the axial segregation and is characterized by an inner core...
متن کاملContinuum theory of axial segregation in a long rotating drum.
We develop a continuum description for the axial segregation of granular materials in a long rotating drum based on the dynamics of the thin near-surface granular flow coupled to bulk flow. The equations of motion are reduced to the one-dimensional system for two local variables only, the concentration difference and the dynamic angle of repose, or the average slope of the free surface. The par...
متن کاملRadial Segregation in a Two-Dimensional Rotating Drum
We simulate the size segregation of a binary mixture of granular material in a half filled two-dimensional rotating drum using the discrete elements method with linear contact forces. The dynamics of the segregation process is studied in detail as function of the angular velocity of the drum. We propose an order parameter to characterize the final amount of segregation and the segregation speed...
متن کاملPattern selection by a granular wave in a rotating drum.
The results of an experimental investigation of granular segregation in a thin rotating drum are presented. A mechanism based on the presence of an uphill wave of particles has been found to govern the observed pattern of petals. Specifically we develop a simple model that captures the essential physics of the segregation and yields an algebraic expression that predicts the number of petals in ...
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ژورنال
عنوان ژورنال: Journal of the Visualization Society of Japan
سال: 2008
ISSN: 0916-4731,1884-037X
DOI: 10.3154/jvs.28.231