Velocity of Sound in Liquid Helium at its Lambda Point

1965 ◽  
Vol 15 (9) ◽  
pp. 386-389 ◽  
Author(s):  
Isadore Rudnick ◽  
Kenneth A. Shapiro
1988 ◽  
Vol 21 (4) ◽  
pp. L75-L81 ◽  
Author(s):  
J Maza ◽  
F Miguelez ◽  
A Veira ◽  
F Vidal

Physica ◽  
1958 ◽  
Vol 24 (1-5) ◽  
pp. 59-67 ◽  
Author(s):  
A. van Itterbeek ◽  
W. de Laet

Physica ◽  
1954 ◽  
Vol 20 (1-6) ◽  
pp. 307-310 ◽  
Author(s):  
A. Van Itterbeek ◽  
G.J. Van Den Berg ◽  
W. Limburg

Author(s):  
A. C. Hollis-Hallett

ABSTRACTLiquid helium II was contained in the annular space between two co-axial cylinders, the inner of which was suspended by a torsion fibre while the outer was rotated at constant speeds. The torque upon the inner cylinder produced by the rotating fluid was measured for various steady velocities between 0·1 and 3 cm.sec.1, and was not found to be directly proportional to the velocity of rotation at any temperature between the lambda-point and 1·15° K. This result suggests that there must be some new type of non-linear frictional force acting in the liquid, possibly in addition to the Gorter-Mellink force of mutual friction.Extrapolation of the experimental results to zero velocity gives values of the coefficient of viscosity of the normal component which agree with the oscillating disk values between the lambda-point and about 1·6° K. At lower temperatures, the present results are significantly lower, suggesting, perhaps, that the values of the normal component density used in the analysis of the oscillating disk results were too low.


1938 ◽  
Vol 54 (7) ◽  
pp. 506-509 ◽  
Author(s):  
J. C. Findlay ◽  
A. Pitt ◽  
H. Grayson Smith ◽  
J. O. Wilhelm

2002 ◽  
Vol 60 (2) ◽  
pp. 295-301 ◽  
Author(s):  
S. L Prischepa ◽  
L. V Mercaldo ◽  
C Attanasio ◽  
M Salvato ◽  
L Maritato ◽  
...  

1978 ◽  
Vol 67 (5-6) ◽  
pp. 387-390 ◽  
Author(s):  
Volker Dohm ◽  
Richard A. Ferrell

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