Stochastic Aspects of Granular Flow in Vibrated Beds

Ricky Wildman, Jonathan Huntley
2002 Kona : Powder and Particle  
A stochastic approach has been taken to examine the f low behaviour of particles in a vibrated granular bed. The coordinates of a single grain were determined as a function of time using the technique of positron emission particle tracking. Following a particle for extended periods allowed a detailed representation of the displacement probability density to be built up. This showed that, initially, particles dispersed according to a Gaussian law, but that the variation in the solid fraction of
more » ... rains, their granular temperature and the presence of walls meant that significant distortions were observed over longer timescales. The determination of the displacement probability density allowed the spatial distribution of the granular temperature and the diffusion coefficient to be measured in both mono-and bi-disperse granular systems.
doi:10.14356/kona.2002013 fatcat:gzzft5fmyfaonomxbfu54byq2u