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Order-disorder transitions in a sheared many-body system

Pfeifer, Jens C. and Bischoff, Tobias and Ehlers, Georg and Eckhardt, Bruno (2015) Order-disorder transitions in a sheared many-body system. Physical Review E, 92 (6). Art. No. 062208 . ISSN 1539-3755.

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Motivated by experiments on sheared suspensions that show a transition between ordered and disordered phases, we here study the long-time behavior of a sheared and overdamped two-dimensional system of particles interacting by repulsive forces. As a function of interaction strength and shear rate we find transitions between phases with vanishing and large single-particle diffusion. In the phases with vanishing single-particle diffusion, the system evolves towards regular lattices, usually on very slow time scales. Different lattices can be approached, depending on interaction strength and forcing amplitude. The disordered state appears in parameter regions where the regular lattices are unstable. Correlation functions between the particles reveal the formation of shear bands. In contrast to single-particle densities, the spatially resolved two-particle correlation functions vary with time and allow to determine the phase within a period. As in the case of the suspensions, motion in the state with low diffusivity is essentially reversible, whereas in the state with strong diffusion it is not.

Item Type:Article
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URLURL TypeDescription Material Paper
Bischoff, Tobias0000-0003-3930-2762
Additional Information:© 2015 American Physical Society. Received 17 July 2015; revised manuscript received 1 December 2015; published 28 December 2015.
Issue or Number:6
Classification Code:PACS number(s): 45.70.−n, 45.50.−j, 05.45.−a, 05.65.+b
Record Number:CaltechAUTHORS:20160121-112508251
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Official Citation:Order-disorder transitions in a sheared many-body system Jens C. Pfeifer, Tobias Bischoff, Georg Ehlers, and Bruno Eckhardt Phys. Rev. E 92, 062208 – Published 28 December 2015
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63841
Deposited By: Tony Diaz
Deposited On:21 Jan 2016 21:00
Last Modified:03 Oct 2019 09:32

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