Article (Scientific journals)
How size ratio and segregation affect the packing of binary granular mixtures
Pillitteri, Salvatore; Opsomer, Eric; Lumay, Geoffroy et al.
2020In Soft Matter
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This study is conducted in the framework of the ‘‘PowderReg’’ project, funded by the European program Interreg VA GR within the priority axis 4 ‘‘Strengthen the competitiveness and the attractiveness of the Grande Re´gion/Grobregion’’. We thank M. Marck for helping us to realize all the measurements.


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Keywords :
granular mixture; segregation; packing fraction
Abstract :
[en] 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 a. In addition, we show how granular segregation affects the global packing fraction. We propose a model with a strong dependency on a that takes into account possible granular segregation. Our model is in good agreement with both earlier experimental and simulation data.
Research Center/Unit :
GRASP
Disciplines :
Physics
Author, co-author :
Pillitteri, Salvatore ;  Université de Liège - ULiège > Département de physique > Physique statistique
Opsomer, Eric  ;  Université de Liège - ULiège > Département de physique > Physique statistique
Lumay, Geoffroy ;  Université de Liège - ULiège > Département de physique > Physique expér. de la matière molle et des syst. complexes
Vandewalle, Nicolas  ;  Université de Liège - ULiège > Département de physique > Physique statistique
Language :
English
Title :
How size ratio and segregation affect the packing of binary granular mixtures
Publication date :
11 September 2020
Journal title :
Soft Matter
ISSN :
1744-683X
eISSN :
1744-6848
Publisher :
Royal Society of Chemistry, United Kingdom
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
PowderReg
Funders :
Interreg
Available on ORBi :
since 23 May 2021

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