Second-Sound Attenuation in Rotating Helium II Close to the Lambda Point

1967 ◽  
Vol 155 (1) ◽  
pp. 75-77 ◽  
Author(s):  
J. A. Lipa ◽  
C. J. Pearce ◽  
P. D. Jarman
Keyword(s):  
Sound Attenuation ◽  
Second Sound ◽  
Helium Ii ◽  
Lambda Point

Second Sound Attenuation in Rotating Helium II

1955 ◽  
Vol 99 (6) ◽  
pp. 1667-1672 ◽  
Author(s):  
R. G. Wheeler ◽  
C. H. Blakewood ◽  
C. T. Lane
Keyword(s):  
Sound Attenuation ◽  
Second Sound ◽  
Helium Ii

Second Sound Attenuation in Liquid Helium II

1954 ◽  
Vol 95 (2) ◽  
pp. 321-327 ◽  
Author(s):  
W. B. Hanson ◽  
J. R. Pellam
Keyword(s):  
Liquid Helium ◽  
Sound Attenuation ◽  
Second Sound ◽  
Helium Ii

Evolution of superfluid vortex line density behind a heat (second-sound) pulse in helium II

1989 ◽  
Vol 63 (1) ◽  
pp. 39-42 ◽  
Author(s):  
M. v. Schwerdtner ◽  
G. Stamm ◽  
D. W. Schmidt
Keyword(s):  
Vortex Line ◽  
Sound Pulse ◽  
Second Sound ◽  
Line Density ◽  
Helium Ii

THE ATTENUATION OF SECOND SOUND IN LIQUID HELIUM II ABOVE 1°K.

1954 ◽  
Vol 32 (6) ◽  
pp. 381-392 ◽  
Author(s):  
K. R. Atkins ◽  
K. H. Hart
Keyword(s):  
Thermal Conductivity ◽  
Continuous Wave ◽  
Pulse Length ◽  
Boundary Effects ◽  
Second Sound ◽  
Sound Beam ◽  
Helium Ii ◽  
Viscosity Effects ◽  
Order Of Magnitude ◽  
Good Agreement

The second sound was in the form of a pulsed continuous wave with a pulse length of 1 to 2 msec, and a carrier frequency of 10 or 20 kc./s. The change in amplitude of the pulse was measured as the distance between the transmitter and the receiver was varied. To avoid boundary effects, no propagation tube was used and allowance had to be made for the spreading of the second sound beam. The attenuation was found to increase with increasing second sound amplitude. The attenuation extrapolated to zero amplitude had a finite value which increased rapidly as the temperature was lowered towards 1°K. Its order of magnitude was too large to be explained by viscosity effects, but was in good agreement with a thermal conductivity effect predicted by Khalatnikov.

Nonlinear Taylor–Couette flow of helium II

1995 ◽  
Vol 283 ◽  
pp. 329-340 ◽  
Author(s):  
Karen L. Henderson ◽  
Carlo F. Barenghi ◽  
Chris A. Jones
Keyword(s):  
Couette Flow ◽  
Equations Of Motion ◽  
Experimental Results ◽  
Second Sound ◽  
Helium Ii ◽  
Vortex Lines ◽  
Taylor Couette ◽  
First Time ◽  
Two Fluid ◽  
Taylor Couette Flow

We solve the nonlinear two-fluid Hall–Vinen–Bekharevich–Khalatnikov equations of motion of helium II for the first time and investigate the configuration of quantized vortex lines in Taylor–Couette flow. The results are interpreted in terms of quantities which can be observed by measuring the attenuation of second sound. Comparison is made with existing experimental results.

Sign in / Sign up

Export Citation Format

Share Document