ESPCI web site
PMMH’s weekly seminar is held every Friday at 11 am (map)
Stéphane Perrard
Etienne Reyssat
Virgile Thiévenaz
PMMH
BARRE CASSAN
BAT A 1ER ETAGE CASE 18
7 QUAI SAINT BERNARD
75005 PARIS
France
Tel : (33) 1 40 79 45 22
Hartmut Löwen (Universität Düsseldorf)
Collective dynamics of self-propelled particles : from crystallization to turbulence
We explore active rod-like colloidal particles by computer simulation and theory. First of all, the Brownian motion of self-propelled particles is described. Then Brownian dynamics simulations
are used to explore the non-equilibrium dynamics of concentrated self-propelled rods which are interacting via a Yukawa segment model. In a linear channel, transient hedgehog-clustering at the system
boundaries is found [1]. In the two-dimensional bulk, anomalous
turbulence emerges [2] in agreement with recent experimental data on
bacterial motion [3]. We then discuss possibilities to trap self-propelled particles efficiently [4]. Finally we study the crystallization transition for very dense self-propelled particles and find differences to equilibrium freezing [5,6].
[1] H. H. Wensink, H. Lowen,
Phys. Rev. E 78, 031409 (2008).
[2] H. H. Wensink, H. Lowen,
Emergent states in dense systems of active rods : from swarming to
turbulence,
J. Phys. : Condensed Matter (in press), see also
http://arxiv.org/abs/1204.0381
[3] H. H. Wensink, J. Dunkel,
S. Heidenreich, K. Drescher, R. E. Goldstein, H. Lowen, J. M. Yeomans,
PNAS 109, 14308-14313 (2012).
[4] A. Kaiser, H. H. Wensink, H. Lowen,
Physical Review Letters 108, 268307 (2012).
[5] J. Bialké, T. Speck, H. Lowen,
Physical Review Letters 108, 168301 (2012).
[6] A. M. Menzel, H. Lowen,
Traveling and resting crystals in active systems,
http://arxiv.org/abs/1209.3537
The audience is composed of people with rather heterogeneous backgrounds including specialists in solids, fluids, granular flows, statistical physics... so the idea is to keep your talk understandable by people not necessarily working in your field... The seminar time slot runs from 11am to noon so the best is to make the talk last around 45 minutes to leave some time for discussion.
- Séminaires ESPCI-ENS de biophysique
- Séminaires du Département de Physique de l’ENS
- Séminaires du Laboratoire d’Hydrodynamique de l’X
- Séminaire de Mécanique d’Orsay (page web FAST)
- Séminaire de Mécanique d’Orsay (page web LIMSI)
- Séminaire de Mécanique des Fluides de l’Institut Jean le Rond d’Alembert
- Séminaires du laboratoire MSC, Paris VII
- Séminaires Gulliver
Link to cofee seminar (internal, every Thursday)
