Date of this Version
Physical Review E
The dynamics of a sphere fluidized in a nearly levitating upflow of air were previously found to be identical to those of a Brownian particle in a two-dimensional harmonic trap, consistent with a Langevin equation [Ojha et al., Nature (London) 427, 521 (2004)]. The random forcing, the drag, and the trapping potential represent different aspects of the interaction of the sphere with the air flow. In this paper we vary the experimental conditions for a single sphere, and report on how the force terms in the Langevin equation scale with air flow speed, sphere radius, sphere density, and system size. We also report on the effective interaction potential between two spheres in an upflow of air.
© 2005 American Physical Society. You can view the original article at: https://journals.aps.org/pre/abstract/10.1103/PhysRevE.71.016313
Ojha, R., Abate, A. R., & Durian, D. J. (2005). Statistical Characterization of the Forces on Spheres in an Upflow of Air. Physical Review E, 71 (1), 016313-1-016313-7. http://dx.doi.org/10.1103/PhysRevE.71.016313
Date Posted: 13 October 2017
This document has been peer reviewed.