Title

Nonperiodic time dependence at the onset of convection in a binary liquid mixture

Document Type

Article

Publication Date

September 1988

Abstract

We report measurements of the convective heat transport near the onset of convection in a normal 3He-4He mixture for values of the separation ratio ψ between -0.044 and -0.010. For ψ≲−0.018, the first bifurcation was to a relatively large-amplitude time-dependent state with characteristic frequencies over an order of magnitude smaller than predicted by linear-stability analysis. The onset of the time dependence was intermittent and not hysteretic. Above onset, the frequency spectrum of the time dependence either contained discrete frequencies or not, depending on ψ.

Journal

Physical Review A

Volume

38

Issue

6

First Page

3143

Last Page

3146

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