Title

Hopf bifurcation to convection near the codimension-two point in a 3He-4He mixture.

Document Type

Article

Publication Date

July 1988

Abstract

From measurements of the convective heat transport in a normal 3He-4He mixture over the range −0.018≲ψ≲0.015 of the separation ratio ψ, we found a time-periodic state for ψ<ψCT=−0.0044. The dimensionless onset frequency at ψCT was 1.42, much larger than the value predicted by linear-stability analysis for a spatially uniform, laterally infinite system. For ψCT>ψ>ψc≈−0.010 the bifurcation to oscillations was forward while for ψ≲ψc it was backward. The results suggests that ψc is an additional codimension-two point, rather than a Hopf tricritical point.

Journal

Physical Review Letters

Volume

61

Issue

1

First Page

78

Last Page

81

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