Related Experiment Video
Updated: Mar 22, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
Granular flow regimes in rotating drums from depth-integrated theory
C-Y Hung1, C P Stark2, H Capart3
1Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964, USA and Department of Civil Engineering and Hydrotech Research Institute, National Taiwan University, Taipei, Taiwan.
Abstract:
Granular flows in rotating drums transition between two regimes characterized by straight and curved free surfaces. Here we predict this behavior using a depth-integrated theory applicable to general eroding flows. Closure is achieved by a local μ(I) rheology and an equation for kinetic energy. Spanning the transition, the theory yields relations for all flow properties in terms of a single dimensionless rotation rate. In accord with experiments, distinct scaling laws are obtained for slow and fast rates, dominated respectively by local energy dissipation and longitudinal energy transfer.
More Related Videos
11:51Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
Published on: February 22, 2018
12:26Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
Published on: August 27, 2013
Related Concept Videos
Irrotational Flow
Gradually Varying Flow
Rapidly Varying Flow
Introduction to Types of Flows
Two-dimensional flow involves changes in both length and height, as seen in...
Steady, Laminar Flow in Circular Tubes
Underflow Gates