Funnel Flow in Hoppers

[+] Author and Article Information
T. V. Nguyen, C. E. Brennen, R. H. Sabersky

Division of Engineering and Applied Science 104-44, California Institute of Technology, Pasadena, Calif. 91125

J. Appl. Mech 47(4), 729-735 (Dec 01, 1980) (7 pages) doi:10.1115/1.3153782 History: Received November 01, 1979; Revised April 01, 1980; Online July 21, 2009


Detailed observations of funnel flows of dry granular materials in wedge-shaped hoppers of different geometries are presented. The variations of the flow regime with changes in the height of material in the hopper/vertical bin configuration, the width of the vertical bin, the hopper angle and the hopper opening width were investigated and a number of specific flow regimes identified (mass flow and several forms of funnel flow). In the first part of the paper particular attention is paid to the conditions for transition from one flow regime to another; in particular it is shown that the existence of a funnel depends not only on the hopper angle but is also strongly dependent on the geometry of the hopper/bin system. In the second part of the paper the variations in the shape of the funnel near the exit opening are explored in detail.

Copyright © 1980 by ASME
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