Effects of liquid volume and viscosity on the dynamics of granular avalanche down inclined chute
Date Issued
2010
Date
2010
Author(s)
Huang, Tzy-Wei
Abstract
A laboratory-scale facility composed of an inclined flume and the reservoir is constructed to investigate the moving avalanche of granular behavior with respect to various inclinations and interstitial liquid volume. The unsteady bulk motion of the granular mixtures prepared with matched same potential energy is obtained by employing the high-speed camera with the methods of Circular Hough Transform (CHT) and particle tracking velocimetry (PTV). We find that the bulk-averaged velocity, basal slip velocity and strain-rate profiles of the mixtures are different under non-immersed, partially-immersed and fully-immersed situations. Coexisting liquid has a strong effect on unifying the bulk motion across the flow depth, which indicates that the Savage-Hutter model developed for surface granular flow may be more feasible for capturing the avalanche of immersed mixtures than dry bulk.
Subjects
reservoir
avalanche of granular behavior
interstitial liquid volume
CHT
PTV
Type
thesis
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