title: Underlying Asymmetry within Particle Size Segregation.
abstract: We experimentally study particle scale dynamics during segregation of a bidisperse mixture under oscillatory shear. Large and small particles show an underlying asymmetry that is dependent on the local particle concentration, with small particles segregating faster in regions of many large particles and large particles segregating slower in regions of many small particles. We quantify the asymmetry on bulk and particle scales, and capture it theoretically. This gives new physical insight into segregation and reveals a similarity with sedimentation, traffic flow, and particle diffusion.
authors.affiliation: Environmental Hydraulics Laboratory, École Polytechnique Fédérale de Lausanne, Écublens, 1015 Lausanne, Switzerland.
authors.forename: K
authors.initials: K
authors.lastname: van der Vaart
authors.affiliation: School of Mathematics and Manchester Centre for Nonlinear Dynamics, University of Manchester, Manchester M13 9PL, United Kingdom.
authors.forename: P
authors.initials: P
authors.lastname: Gajjar
authors.affiliation: Environmental Hydraulics Laboratory, École Polytechnique Fédérale de Lausanne, Écublens, 1015 Lausanne, Switzerland.
authors.forename: G
authors.initials: G
authors.lastname: Epely-Chauvin
authors.affiliation: Environmental Hydraulics Laboratory, École Polytechnique Fédérale de Lausanne, Écublens, 1015 Lausanne, Switzerland.
authors.forename: N
authors.initials: N
authors.lastname: Andreini
authors.affiliation: School of Mathematics and Manchester Centre for Nonlinear Dynamics, University of Manchester, Manchester M13 9PL, United Kingdom.
authors.forename: J M N T
authors.initials: JM
authors.lastname: Gray
authors.affiliation: Environmental Hydraulics Laboratory, École Polytechnique Fédérale de Lausanne, Écublens, 1015 Lausanne, Switzerland.
authors.forename: C
authors.initials: C
authors.lastname: Ancey