Behaviour of a particle bed in the field of vibration I. Analysis of particle motion in a vibrating vessel

Takahashi, H.; Suzuki, Akira; Tanaka, Tatsuo

doi:10.1016/0032-5910(68)80039-7

Cited by 52 publications

(17 citation statements)

References 3 publications

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“…The effects of vertical vibration on flow from wedgeshaped hoppers and flat bottom bins were first examined by Takahashi et al 3 and Suzuki et al 4 These studies reported the appearance of convection cells near the inclined wall boundaries of the hopper. In addition, the discharge rate was shown to increase with vibrational frequency at a fixed acceleration level, but that at the highest accelerations the discharge rate decreased significantly.…”

Section: Introductionmentioning

confidence: 99%

Effects of vertical vibration on hopper flows of granular material

et al. 2002

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The discharge of granular material from a hopper subject to vertical sinusoidal oscillations was investigated using experiments and discrete element computer simulations. With the hopper exit closed, side-wall convection cells are observed, oriented such that particles move up along the inclined walls of the hopper and down at the center line. The convection cells are a result of the granular bed dilation during free fall and the subsequent interaction with the hopper walls. The mass discharge rate for a vibrating hopper scaled by the discharge rate without vibration reaches a maximum value at a dimensionless velocity amplitude just greater than 1. Further increases in the velocity decrease the discharge rate. This decrease occurs due to a decrease in the bulk density of the discharging material when vibration is applied.

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Section: Introductionmentioning

confidence: 99%

Effects of vertical vibration on hopper flows of granular material

et al. 2002

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“…Many researchers study vibro-fluidized deep granular beds in one dimension (height only) [28] or in two dimensions, height and width, [47,48] using particle tracking. A few researchers study the affects of vibration on three dimensional deep granular beds.…”

Section: Introductionmentioning

confidence: 99%

Transitions to vibro-fluidization in a deep granular bed

Ford¹,

Gilchrist²,

Caram³

2009

Powder Technology

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“…For instance, some measurements [10] reveal that the flow at high accelerations is reduced a little, although in this case the air flow is relevant. Later studies [11] also find very small influence of the vibration on the mass flow rate.…”

Section: Introductionmentioning

confidence: 99%

Avoiding clogs: The shape of arches and their stability against vibrations

Garcimartín¹,

Lozano²,

Lumay³

et al. 2013

AIP Conference Proceedings

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Abstract. A distinctive feature of discrete solids is their ability to form arches. These mechanically stable structures alter the isotropy of granular packings and can arrest the motion of grains when, for example, they flow through a bottleneck. Breaking arches can be achieved by means of an external vibration, which effectively eliminates clogging. Indeed, these phenomena and procedures are quite common in industrial applications. Nevertheless, there are not rigorous, well founded criteria to determine the most efficient way to break arches and restore the flow of grains. This happens in part because it is not known which are the relevant characteristics that boost the arch strength. In the experiment presented here, we have carried out a statistical analysis of the arches that block the exit orifice at the bottom of a two dimensional silo, and described their geometrical properties. We then submit the silo to an external vibration. We find that the larger the outlet size, the weaker the arches that clog it. This dependence is just the outcome of a more complicated process that involves geometrical defects in the arch. The defects are quantitatively defined in terms of contact angles and we show that this is a key factor regarding the endurance of arches.

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Behaviour of a particle bed in the field of vibration I. Analysis of particle motion in a vibrating vessel

Cited by 52 publications

References 3 publications

Effects of vertical vibration on hopper flows of granular material

Effects of vertical vibration on hopper flows of granular material

Transitions to vibro-fluidization in a deep granular bed

Avoiding clogs: The shape of arches and their stability against vibrations

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