Article (Scientific journals)
Clustering and segregation in driven granular fluids
Opsomer, Eric; Vandewalle, Nicolas; Noirhomme, Martial et al.
2014In European Physical Journal E. Soft Matter
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Keywords :
clustering; granular gas; molecular dynamics
Abstract :
[en] In microgravity, the successive inelastic collisions in a granular gas can lead to a dynamical clustering of the particles. This transition depends on the filling fraction of the system, the restitution of the used materials and on the size of the particles. We report simulations of driven bi-disperse gas made of small and large spheres. The size as well as the mass difference imply a strong modification in the kinematic chain of collisions and therefore alter significantly the formation of a cluster. Moreover, the different dynamical behaviors can also lead to a demixing of the system, adding a few small particles in a gas of large ones can lead to a partial clustering of the taller type. We realized a detailed phase diagram recovering the encountered regimes and developed a theoretical model predicting the possibility of dynamical clustering in binary systems.
Disciplines :
Physics
Author, co-author :
Opsomer, Eric  ;  Université de Liège - ULiège > Département de physique > Physique statistique
Vandewalle, Nicolas  ;  Université de Liège - ULiège > Département de physique > Physique statistique
Noirhomme, Martial ;  Université de Liège - ULiège > Département de physique > Département de physique
Ludewig, François ;  Université de Liège - ULiège > Département de physique > Physique statistique
Language :
English
Title :
Clustering and segregation in driven granular fluids
Publication date :
24 November 2014
Journal title :
European Physical Journal E. Soft Matter
ISSN :
1292-8941
eISSN :
1292-895X
Publisher :
Springer Science & Business Media B.V., New York, United States - New York
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 24 February 2015

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