Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/101648
Title: Unknotting of quasi-two-dimensional ferrogranular networks by in-plane homogeneous magnetic fields
Authors: Sánchez, P. A.
Miller, J.
Kantorovich, S. S.
Richter, R.
Issue Date: 2020
Publisher: Elsevier B.V.
Citation: Unknotting of quasi-two-dimensional ferrogranular networks by in-plane homogeneous magnetic fields / P. A. Sánchez, J. Miller, S. S. Kantorovich, et al. — DOI 10.1016/j.jmmm.2019.166182 // Journal of Magnetism and Magnetic Materials. — 2020. — Vol. 499. — 166182.
Abstract: Our ongoing research addresses, by means of experiments and computer simulations, the aggregation process that takes place in a shaken granular mixture of glass and magnetized ferrous alloy beads when the shaking amplitude is suddenly decreased. After this quenching, the magnetized beads form a transient network that coarsens in time into compact clusters, following a viscoelastic phase separation. Here we focus on the quasi-two-dimensional case, analyzing in computer simulations the effects of a magnetic field parallel to the system plane. Our results evidence that the field drastically changes the structure of the forming network: chains and elongated clusters parallel to the field are favored whereas perpendicular connecting structures tend to be suppressed, leading to the unknotting of the networks which are observed at zero field. Importantly, we found that moderate field strengths lead to the formation of larger clusters at intermediate time intervals than in the case of weak and strong fields. Moreover, the latter tend to limit the overall growth of the clusters at longer time scales. These results may be relevant in different systems governed by similar magnetically driven aggregation processes as, for example, in the formation of iron-rich planetesimals in protoplanetary discs or for magnetic separation systems. © 2019 Elsevier B.V.
Keywords: FERROGRANULATE MIXTURE
FIELD INDUCED NETWORK UNKNOTTING
LANGEVIN DYNAMICS SIMULATION
SUSCEPTIBLE DIPOLAR HARD SPHERES
TRANSIENT NETWORK
VISCOELASTIC PHASE SEPARATION
IRON ALLOYS
MAGNETIC SEPARATION
MIXTURES
MOLECULAR DYNAMICS
VISCOELASTICITY
DIPOLAR HARD SPHERES
FIELD INDUCED
LANGEVIN DYNAMICS
TRANSIENT NETWORK
VISCOELASTIC PHASE SEPARATION
PHASE SEPARATION
URI: http://hdl.handle.net/10995/101648
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85076352645
PURE ID: 11446854
586a0389-b6b2-4453-bbf8-113136623742
ISSN: 3048853
DOI: 10.1016/j.jmmm.2019.166182
metadata.dc.description.sponsorship: Research supported by the Russian Science Foundation Grant No. 19-12-00209 . Simulations were performed at the Vienna Scientific Cluster (VSC3). R.R. gratefully acknowledges I. Rehberg for supporting his attendance to ICMF19.
RSCF project card: 19-12-00209
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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