Europhys. Lett.
Volume 69, Number 2, January 2005
Page(s) 291 - 297
Section Interdisciplinary physics and related areas of science and technology
Published online 15 December 2004
Europhys. Lett., 69 (2), pp. 291-297 (2005)
DOI: 10.1209/epl/i2004-10321-4

T-structured fluid and jamming in driven Brownian rotators

R. Kirchhoff and H. Löwen

Institut für Theoretische Physik II, Heinrich-Heine-Universität Düsseldorf Universitätsstrasse 1, 40225 Düsseldorf, Germany

received 9 August 2004; accepted in final form 4 November 2004
published online 15 December 2004

The dynamics of two-dimensional suspensions of Brownian rods which are driven by an external torque are explored by computer simulation and instability theory. For increasing density the system self-organizes into a "T-structured fluid", where neighbouring rods preferentially orient perpendicular to each other until an overlap density is reached. Then a sharp jamming transition occurs towards a dynamically blocked state with parallel neighbouring rods.

82.70.Dd - Colloids.
61.20.Ja - Computer simulation of liquid structure.
82.70.Gg - Gels and sols.

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