Chapter
Apr 26, 2012
Fundamental Characteristics of Granular Flow Under Variable g-Levels
Authors: Richard M. Lueptow r-lueptow-northwestern.edu, Tim Arndt [email protected], Antje Brucks [email protected], and Julio M. Ottino [email protected]Author Affiliations
Publication: Earth & Space 2006: Engineering, Construction, and Operations in Challenging Environment
Abstract
Our understanding of gravity-driven granular flows is based almost exclusively on experiments under Earth's gravity. Here we show that the dynamic angle of repose, or slope, of the flowing shear layer in the canonical case of granular flow in a tumbler of radius r rotating at ω is properly characterized by the Froude number, Fr = ω2 r/g, when the acceleration g is varied over a wide range in a large centrifuge. Creeping motion of the subsurface flow is also affected by the g-level.
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© 2006 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208. E-mail: r-lueptow-northwestern.edu
ZARM, Universität Bremen, Am Fallturm, 28359 Bremen, Germany. E-mail: [email protected]
ZARM, Universität Bremen, Am Fallturm, 28359 Bremen, Germany. E-mail: [email protected]
Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL 60208. E-mail: [email protected]
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