Persistent global power fluctuations near a dynamic transition in electroconvection

Details Persistent global power fluctuations near a dynamic transition in electroconvection Persistent global power fluctuations near a dynamic transition in electroconvection

2003-01-16

arxiv.org/abs/nlin/0301019v1

Nonlinear Sciences

Pattern Formation and Solitons

Scientific paper

10.1103/PhysRevE.68.030101

This is a study of the global fluctuations in power dissipation and light transmission through a liquid crystal just above the onset of electroconvection. The source of the fluctuations is found to be the creation and annihilation of defects. They are spatially uncorrelated and yet temporally correlated. The temporal correlation is seen to persist for extremely long times. There seems to be an especially close relation between defect creation/annihilat ion in electroconvection and thermal plumes in Rayleigh-B\'enard convection.

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