Breakdown of fourier’s law near the superfluid transition in 4He

Peter K. Day, William A. Moeur, Steven S. McCready, Dmitri A. Sergatskov, Feng Chuan Liu, Robert V. Duncan

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


The behavior of the superfluid - normal fluid interface in hHe has been studied in the presence of a heat flux, Q, in the range 0.1 < Q < 6 egr s−1 cm−2. Fourier’s Law, Q = κ▽ T, has been observed, for the first time, to break down very close to the interface. In the nonlinear region, κ depends on Q. Theoretical predictions, which do not take gravity into account, are compared with these experimental results. The predicted extent of the nonlinear region agrees well with the data; however, at lower Q, a systematic discrepancy is found that may be ascribed to the effect of gravity on the interface.

Original languageEnglish
Pages (from-to)2474-2477
Number of pages4
JournalPhysical Review Letters
Issue number12
StatePublished - Sep 21 1998


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