Metastable Heat Flow Phenomena and Drooping Pressure Differences in He II Using Multiple Channel Configurations
Metastable Heat Flow Phenomena and Drooping Pressure Differences in He II Using Multiple Channel Configurations
复制标题
使用多通道配置的 He II 中的亚稳态热流现象和下降压差
DOI：
10.1007/978-1-4613-9874-5_49
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发表时间：
1988
影响因子：
8.1
通讯作者：
S. V. Sciver
中科院分区：
文献类型：
--
作者：
B. Helvensteijn;S. V. Sciver
在低于拉姆达点压力的压力下，在一维多通道配置中证明了液氦从 He II 相过热到 3.0 K。各个通道的直径为 10、50 或 100 μm。逆流是通过加热通过多通道连接到浴槽的下部储液器而产生的。当温度因湍流而急剧升高时，喷泉压力达到稳定状态。观察到的 Gorter-Mellink 参数在 100 μm 以下似乎与直径相关。与涡线密度衰减相关的弛豫时间可能会对冷却过程中 He II 的热导率产生不利影响。
Superheating of liquid helium from the He II phase up to 3.0 K is demonstrated in one dimensional multiple channel configurations at pressures below the lamda point pressure. The individual channels have diameters of 10, 50 or 100 μm. Counterflow is produced by heating the lower reservoir which is connected to the bath through the multiple channel. The fountain pressure reaches a plateau when the temperature increases steeply due to turbulence. The observed Gorter-Mellink parameter appears diameter-dependent below 100 μm. Relaxation times related to the decay of the vortex line density may adversely effect He II thermal conductivity during cooldowns.