The behavior of vibrated systems

Resonance‐induced acceleration of theRBNE‐BNEsegregation inversion

“…On the contrary, reverse BNE (RBNE) is defined for the inverse segregation state. 8,18,19,[23][24][25][26][27] Similarly, the segregation pattern of binary mixtures in mass density has also been proposed as BNE in our previous works, in which heavier grains tend to sink down relative to lighter ones. 28,29 RBNE is also borrowed to describe the reverse pattern.…”

“…Brazil nut effect (BNE) in many works was originally used to describe a segregation pattern of binary mixtures in size, in which larger and smaller grains are at top and bottom layers, respectively. On the contrary, reverse BNE (RBNE) is defined for the inverse segregation state 8,18,19,23–27 . Similarly, the segregation pattern of binary mixtures in mass density has also been proposed as BNE in our previous works, in which heavier grains tend to sink down relative to lighter ones 28,29 .…”

Recent advances in positron emission particle tracking: a comparative review

“…In addition to the more applied research described above, in the later 90s, PEPT became more widely adopted in the study of the fundamental physics of particulate and multiphase systems. Due to its improved data acquisition rate compared to other three-dimensional imaging methods [58] such as x-ray CT [147], RIMS [148] or PET [149], and its improved spatial resolution as compared to radioactive particle tracking [150] or magnetic particle tracking [151], PEPT has proved a highly popular means of studying the dynamics of granular gases [152], whose rapid dynamics researchers could not previously capture precisely using conventional techniques. Granular gases, and more generally 'vibrofluidised' granular beds [153], provide a valuable canonical system in which to study the fundamental phenomena and dynamics of particulate media [58], making them a common choice for such pure-physics studies.…”

“…Due to its improved data acquisition rate compared to other three-dimensional imaging methods [58] such as x-ray CT [147], RIMS [148] or PET [149], and its improved spatial resolution as compared to radioactive particle tracking [150] or magnetic particle tracking [151], PEPT has proved a highly popular means of studying the dynamics of granular gases [152], whose rapid dynamics researchers could not previously capture precisely using conventional techniques. Granular gases, and more generally 'vibrofluidised' granular beds [153], provide a valuable canonical system in which to study the fundamental phenomena and dynamics of particulate media [58], making them a common choice for such pure-physics studies. PEPT has been used to study numerous aspects of these systems, including their granular temperature distributions [154] (and the striking non-equipartition thereof [2,155]), their diffusive behaviours [32,156], their velocity distributions [33,157], and phenomena such as jamming [158], segregation [3], and granular convection [1,4].…”

“…frictionless particles, zero gravity) easily achievable. However, DEM results in isolation, due to the many simplifying assumptions of the technique [58], cannot be trusted to be accurate-or even physical [74]. Rigorous, multi-faceted validation, such as that which may be performed through comparison with PEPT data, is required if their results are to be useful.…”