PMID: 11308899Apr 20, 2001Paper

Flow pattern dynamics in convecting liquid helium

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
R G MatleyA L Woodcraft

Abstract

We present experimental data which correlate thermal measurements and flow visualization in convecting liquid 4He. For a small range R(C)<R<R1 of the Rayleigh number R above the convection threshold value R(C) a robust stationary pattern is observed. This pattern exhibits periodic pulsation when R>R1, generating thermal oscillations as in earlier reports. At higher R values the time dependence becomes aperiodic with the surprising appearance of spiral-defect chaos at an aspect ratio smaller than has previously been reported.

References

Sep 27, 1993·Physical Review Letters·S W MorrisG Ahlers
Apr 4, 1994·Physical Review Letters·Y HuG Ahlers
Oct 7, 1996·Physical Review Letters·J Liu, G Ahlers

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Citations

Nov 5, 2004·Physical Review Letters·Matthew J LeesPeter G J Lucas

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