Numerical study of a sphere descending along an inclined slope in a liquid
Publication Date
2017-11-01Journal Title
Granular Matter
ISSN
1434-5021
Publisher
Springer Nature
Volume
19
Issue
4
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Zhang, C., Soga, K., Kumar, K., Sun, Q., & Jin, F. (2017). Numerical study of a sphere descending along an inclined slope in a liquid. Granular Matter, 19 (4)https://doi.org/10.1007/s10035-017-0768-8
Abstract
The descending process of a sphere rolling and/or sliding along an inclined
slope in a liquid involves interactions between the hydrodynamic forces on the sphere
and the contact forces between the sphere and the plane. In this study, the descending
process of sphere in a liquid was examined using coupled LBM-DEM technique. The
effects of slope angle, viscosity and friction coefficient on the movement of a sphere
were investigated. Two distinct descending patterns were observed: (a) a stable
rolling/sliding movement along the slope, and (b) a fluctuating pattern along the slope.
Five dimensionless coefficients (Reynolds number (Re), drag coefficient, lift
coefficient, moment coefficient and rolling coefficient) were used to analyze the
observed processes. The vortex structure in the wake of the sphere gives a lift force to
the sphere, which in turn controls the different descending patterns. It is found that the
generation of a vortex is not only governed by Re, but also by particle rotation.
Relationships between the forces/moments and the dimensionless coefficients are
established.
Embargo Lift Date
2100-01-01
Identifiers
External DOI: https://doi.org/10.1007/s10035-017-0768-8
This record's URL: https://www.repository.cam.ac.uk/handle/1810/270851
Recommended or similar items
The following licence files are associated with this item: