Periodic Motion of Sedimenting Flexible Knots

Détails

ID Serval
serval:BIB_86C1997A4259
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Periodic Motion of Sedimenting Flexible Knots
Périodique
Physical Review Letters
Auteur(s)
Gruziel M., Thyagarajan K., Dietler G., Stasiak A., Ekiel-Jeżewska M.L., Szymczak P.
ISSN
1079-7114
ISSN-L
0031-9007
Statut éditorial
Publié
Date de publication
2018
Peer-reviewed
Oui
Volume
121
Numéro
12
Pages
127801
Langue
anglais
Résumé
We study the dynamics of knotted deformable closed chains sedimenting in a viscous fluid. We show experimentally that trefoil and other torus knots often attain a remarkably regular horizontal toroidal structure while sedimenting, with a number of intertwined loops, oscillating periodically around each other. We then recover this motion numerically and find out that it is accompanied by a very slow rotation around the vertical symmetry axis. We analyze the dependence of the characteristic timescales on the chain flexibility and aspect ratio. It is observed in the experiments that this oscillating mode of the dynamics can spontaneously form even when starting from a qualitatively different initial configuration. In numerical simulations, the oscillating modes are usually present as transients or final stages of the evolution, depending on chain aspect ratio and flexibility, and the number of loops.
Pubmed
Web of science
Création de la notice
08/10/2018 7:48
Dernière modification de la notice
04/11/2019 9:38
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