Issue 39, 2020

How size ratio and segregation affect the packing of binary granular mixtures

Abstract

For reaching high packing fractions, grains of various sizes are often mixed together allowing the small grains to fill the voids created by the large ones. However, in most cases, granular segregation occurs leading to lower packing fractions. We performed a wide set of experiments with different binary granular systems, proving that two main parameters are respectively the volume fraction f of small beads and the grain size ratio α. In addition, we show how granular segregation affects the global packing fraction. We propose a model with a strong dependency on α that takes into account possible granular segregation. Our model is in good agreement with both earlier experimental and simulation data.

Graphical abstract: How size ratio and segregation affect the packing of binary granular mixtures

Supplementary files

Article information

Article type
Paper
Submitted
20 May 2020
Accepted
19 Aug 2020
First published
11 Sep 2020
This article is Open Access
Creative Commons BY-NC license

Soft Matter, 2020,16, 9094-9100

How size ratio and segregation affect the packing of binary granular mixtures

S. Pillitteri, E. Opsomer, G. Lumay and N. Vandewalle, Soft Matter, 2020, 16, 9094 DOI: 10.1039/D0SM00939C

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