The objectives of this contribution are to analyse and quantify the segregation process of water saturated mixtures flowing down steep chutes. Experiments were carried out using two granular mixtures, a steep chute of variable length and a col- lecting box divided by sectors, in which the flowing material freely falls down at the chute outlet. The flow characteristics, the filling in time of the box itself, the grain-size composition of the box content with varying the distance from the chute outlet are examined by means of laser level transducers, image anal- ysis and sieving. Segregation is effective and rapid along the flow direction, showing a modest dependence on mixture grain-size composition. The grain-size composition profile in time is reconstructed, showing coarser par- ticles concentrated at the flow front, on the flow surface and at the sides, whereas fine fractions prevail at the tail and at the bottom.

Segregation process of water-granular mixtures released down a steep chute

GHILARDI, PAOLO;
2010-01-01

Abstract

The objectives of this contribution are to analyse and quantify the segregation process of water saturated mixtures flowing down steep chutes. Experiments were carried out using two granular mixtures, a steep chute of variable length and a col- lecting box divided by sectors, in which the flowing material freely falls down at the chute outlet. The flow characteristics, the filling in time of the box itself, the grain-size composition of the box content with varying the distance from the chute outlet are examined by means of laser level transducers, image anal- ysis and sieving. Segregation is effective and rapid along the flow direction, showing a modest dependence on mixture grain-size composition. The grain-size composition profile in time is reconstructed, showing coarser par- ticles concentrated at the flow front, on the flow surface and at the sides, whereas fine fractions prevail at the tail and at the bottom.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/379487
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