Isotropic convection scenarios in an anisotropic fluid.

Phys Rev Lett 2004 Jul 23;93(4):044502. Epub 2004 Jul 23.

Physikalisches Institut, Universität Bayreuth, Germany.

We study a new variant of electroconvection using a homeotropically aligned nematic liquid crystal. The novelty of this system is a direct transition to roll- or square-type patterns controlled by the frequency of the applied voltage with a rich crossover scenario and strong influence of the zigzag instability even at onset. From the weakly nonlinear theory and simulations of an adapted Swift-Hohenberg model one can understand essential features of the phase diagram. In particular we find a quasiperiodic pattern with square symmetry.

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http://dx.doi.org/10.1103/PhysRevLett.93.044502DOI Listing
July 2004

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References

(Supplied by CrossRef)

M. Westerburg et al.
J. Fluid Mech. 2001

R. B. Hoyle et al.
1998

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