Physics
Critical shear rate and torque stability condition for a particle resting on a surface in a fluid flow
Document Type
Article
Abstract
We advance a quantitative description of the critical shear rate γc needed to dislodge a spherical particle resting on a surface with a model asperity in laminar and turbulent fluid flows. We have built a cone-plane experimental apparatus which enables measurement of γc over a wide range of particle Reynolds number Rep from 10-3 to 1.5 × 103. The condition to dislodge the particle is found to be consistent with the torque balance condition after including the torque component due to drag about the particle centre. The data for Rep 1000. We show that a linear combination of the hydrodynamic coefficients found in the viscous and inertial limits can describe the observed γc as a function of the particle and fluid properties.
Publication Title
Journal of Fluid Mechanics
Publication Date
12-10-2016
Volume
808
First Page
397
Last Page
409
ISSN
0022-1120
DOI
10.1017/jfm.2016.655
Keywords
granular media, particle/fluid flow, sediment transport
Repository Citation
Kudrolli, Arshad; Scheff, David; and Allen, Benjamin, "Critical shear rate and torque stability condition for a particle resting on a surface in a fluid flow" (2016). Physics. 101.
https://commons.clarku.edu/faculty_physics/101
Cross Post Location
Student Publications
