TY - JOUR
T1 - Breakdown of fourier’s law near the superfluid transition in 4He
AU - Day, Peter K.
AU - Moeur, William A.
AU - McCready, Steven S.
AU - Sergatskov, Dmitri A.
AU - Liu, Feng Chuan
AU - Duncan, Robert V.
PY - 1998/9/21
Y1 - 1998/9/21
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0000815843&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.81.2474
DO - 10.1103/PhysRevLett.81.2474
M3 - Article
AN - SCOPUS:0000815843
SN - 0031-9007
VL - 81
SP - 2474
EP - 2477
JO - Physical Review Letters
JF - Physical Review Letters
IS - 12
ER -