Spatiotemporal rheochaos in nematic hydrodynamics

Details Spatiotemporal rheochaos in nematic hydrodynamics Spatiotemporal rheochaos in nematic hydrodynamics

2003-11-05

arxiv.org/abs/cond-mat/0311101v2

Physics

Condensed Matter

Soft Condensed Matter

Slight changes in text, references and Fig. 5 inset; 6 eps figures (figs 2,3,4 at lower resolution to reduce file size; full f

Scientific paper

10.1103/PhysRevLett.92.055501

Motivated by the observation of rheochaos in sheared wormlike micelles [Bandyopadhyay et al., Phys. Rev. Lett, 84 2022, (2000); Europhys. Lett. 56, 447 (2001); Pramana 53, 223 (1999)] we study the coupled nonlinear partial differential equations for the hydrodynamic velocity and order parameter fields in a sheared nematogenic fluid. In a suitable parameter range, we find irregular, dynamic shear-banding and establish by decisive numerical tests that the chaos we observe in the model is spatiotemporal in nature.

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