Turbulence in boundary flow of superfluid He4 triggered by free vortex rings

R. Goto, S. Fujiyama, H. Yano, Y. Nago, N. Hashimoto, K. Obara, O. Ishikawa, M. Tsubota, T. Hata

研究成果: Article査読

65 被引用数 (Scopus)

抄録

The transition to turbulence in the boundary flow of superfluid He4 is investigated using a vortex-free vibrating wire. At high wire vibration velocities, we found that stable alternating flow around the wire enters a turbulent phase triggered by free vortex rings. Numerical simulations of vortex dynamics demonstrate that vortex rings can attach to the surface of an oscillating obstacle and expand unstably due to the boundary flow of the superfluid, forming turbulence. Experimental investigations indicate that the turbulent phase continues even after stopping the injection of vortex rings, which is also confirmed by the simulations.

本文言語English
論文番号045301
ジャーナルPhysical review letters
100
4
DOI
出版ステータスPublished - 2008 2月 1

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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