Size Segregation of Granular Matter in Silo Discharges

Physics – Condensed Matter – Statistical Mechanics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

6 pages, 10 figures (gif format), postscript version at http://physics.clarku.edu/~akudrolli/nls.html

Scientific paper

10.1103/PhysRevE.60.7203

We present an experimental study of segregation of granular matter in a quasi-two dimensional silo emptying out of an orifice. Size separation is observed when multi-sized particles are used with the larger particles found in the center of the silo in the region of fastest flow. We use imaging to study the flow inside the silo and quantitatively measure the concentration profiles of bi-disperse beads as a function of position and time. The angle of the surface is given by the angle of repose of the particles, and the flow occurs in a few layers only near the top of this inclined surface. The flowing region becomes deeper near the center of the silo and is confined to a parabolic region centered at the orifice which is approximately described by the kinematic model. The experimental evidence suggests that the segregation occurs on the surface and not in the flow deep inside the silo where velocity gradients also are present. We report the time development of the concentrations of the bi-disperse particles as a function of size ratios, flow rate, and the ratio of initial mixture. The qualitative aspects of the observed phenomena may be explained by a void filling model of segregation.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Size Segregation of Granular Matter in Silo Discharges does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Size Segregation of Granular Matter in Silo Discharges, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Size Segregation of Granular Matter in Silo Discharges will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-547133

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.