Configuration effect of superfluid helium channel on the λ-transition heat flux

✍ Scribed by T. Okamura; M. Takahashi; D. Muramatsu; H. Kobayashi

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 451 KB
• Volume: 40
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/s0011-2275(00)00060-6

✦ Synopsis

Eects of channel of super¯uid helium (He II) on heat transport characteristics, especially on the k-transition heat ¯ux and temperature rise at the channel end, are investigated experimentally and numerically. The ends of the channel are kept open to an He II bath under the atmospheric pressure condition. Supply of heat to the channel results in temperature rise at the channel end. This temperature rise increases with an increase in aspect ratio of the channel. The increase in temperature rise leads to a decrease in the k-transition heat ¯ux. The temperature rise and the k-transition heat ¯ux are estimated by solving two-dimensional heat transport equation considering not only the channel but also the He II bath. The results of the present study indicates that the temperature distribution in the He II channel is aected by two-or three-dimensional heat ¯ow around the channel end, especially for a channel having larger aspect ratio.