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Pattern Formation from Defect Chaos --- A Theory of Chevrons by Rossberg, A. G.; Kramer, L. is a scholarly article available to read on EtoBox.

What is Pattern Formation from Defect Chaos --- A Theory of Chevrons about?

For over 25 years it is known that the roll structure of electroconvection (EC) in the dielectric regime in planarly aligned nematic liquid crystals has, after a transition to defect chaos, the tendency to form chevron structures. We show, with the help of a coarse-grained model, that this effect can generally be expected for systems with spontaneously broken isotropy, that is lifted by a small external perturbation. The linearized model as well as a nonlinear extension are compared to simulations of a system of coupled amplitude equations which generate chevrons out of defect chaos. The mechanism of chevron formation is similar to the development of Turing patterns in reaction diffusion systems.

Author

Rossberg, A. G.; Kramer, L.

Published

1997

Language

EN