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On the calculation of self-diffusion in vertically agitated granular beds

✍ Scribed by Anthony D. Rosato; Yidan Lan; M.W. Richman

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
325 KB
Volume
182
Category
Article
ISSN
0032-5910

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✦ Synopsis

We present self-diffusion calculations derived from discrete element simulations of an idealized granular material under gravity, which is energized through vertical, sinusoidal oscillations of a plane rigid floor. The bed of particles is agitated to a degree so that computed steady-state profiles of granular temperature and solids fraction are consistent with kinetic theory predictions. The average self-diffusivity for the entire assembly, computed both from the velocity autocorrelation function and the mean-square displacement, is found to compare well with an analytic expression taken from kinetic theory.

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