Use of the particle image velocimetry technique to study the propagation of second sound shock in superfluid helium
Physics of Fluids, ISSN: 1070-6631, Vol: 16, Issue: 12, Page: L99-L102
2004
- 13Citations
- 7Captures
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Article Description
Transient counterflow velocity fields induced by second sound shock in helium II have been measured using the particle image velocimetry (PIV) technique. The arrival of the shock front, passage of the shock tail, and onset of heat diffusion are clearly visualized as velocity profiles of suspended micron-size particles. Measured particle velocities are compared to calculated normal fluid velocities. Other observations include a critical energy flux for the onset of quantum turbulence and random motion of particles behind the shock. These results indicate that PIV may be a useful tool in the study of second sound and superfluid turbulence.
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