Journal
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
Volume 77, Issue 11, Pages -Publisher
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.77.111007
Keywords
superfluid; quantum fluids; thermal counterflow; quantum turbulence; flow visualization
Categories
Funding
- NSF [DMR-0606252, PHY05-51164]
- Center for Nanophysics and Advanced Materials at the University of Maryland
Ask authors/readers for more resources
We discuss an experimental technique to visualize motion in the bulk of superfluid He-4 by tracking micron-sized solid hydrogen tracers. The behavior of the tracers is complex since they may be trapped by the quantized vortices while also interacting with the normal fluid via Stokes drag. We discuss the mechanism by which tracers may be trapped by quantized vortices as well as the dependencies on hydrogen volume fraction, temperature, and flow properties. We apply this technique to study the dynamics of a thermal counterflow. Our observations serve as a direct confirmation of the two-fluid model as well as a quantitative test of the normal fluid velocity dependence on the applied heat flux.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available