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Transient localized states in 2D binary liquid convection
Author(s) -
Kristina Lerman,
Eberhard Bodenschatz,
David S. Cannell,
Guenter Ahlers
Publication year - 1993
Publication title -
physical review letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.688
H-Index - 673
eISSN - 1079-7114
pISSN - 0031-9007
DOI - 10.1103/physrevlett.70.3572
Subject(s) - convection , bifurcation , perpendicular , mechanics , transient (computer programming) , thermal conduction , convection cell , materials science , steady state (chemistry) , physics , nonlinear system , optics , natural convection , thermodynamics , combined forced and natural convection , geometry , chemistry , mathematics , quantum mechanics , computer science , operating system
We report an experimental study of the onset of convection in ethanol/water mixtures confined in a circular cell of radial aspect ratio of 11.6. The initial bifurcation was to radial traveling waves; however, the linear state typically gave way to a nonlinear one in which convection alternately focused along one cell diameter and then another roughly perpendicular to the first. After a number of cycles, this state frequently contracted radially to a localized pulse of traveling-wave convection very similar to those observed in 1[ital D] geometries. The pulses we observed either decayed back to pure conduction or grew to fill or nearly fill the cell.

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