Switching Phenomena between Laminar and Turbulent Flows of Superfluid 4He Generated by a Vibrating Wire |
| |
Authors: | N. Hashimoto A. Handa M. Nakagawa K. Obara H. Yano O. Ishikawa T. Hata |
| |
Affiliation: | (1) Graduate School of Science, Osaka City University, Osaka 558-8585, Japan;(2) Dept. of Physics, Hokkaido University of Education, Kushiro 085-8580, Japan |
| |
Abstract: | We have investigated the turbulence transition of the superfluid 4He flow generated by a vibrating wire. For a 1.2-kHz vibrating wire, we observed intermittent switchings between laminar and turbulent flows. The switching rate decreases with increasing temperature above 100 mK, until no occurrence of the switchings at 350 mK. For a 2.4-kHz vibrating wire, we find that the switching rate is much lower than that of the 1.2-kHz vibrating wire even at low temperatures. This result indicates that a mechanism causing the switchings is influenced by the temperature and the oscillation frequency of the superfluid flow. |
| |
Keywords: | 67.40.Vs 47.27.Cn 47.15.Cb |
本文献已被 SpringerLink 等数据库收录! |
|