| ~4He超流密度分布研究 |
| |
| 引用本文： | 公丕锋,单巍,张金锋,章志敏,吕凯,李宏,尹新国.~4He超流密度分布研究[J].低温与超导,2009,37(6). |
| |
| 作者姓名： | 公丕锋 单巍 张金锋 章志敏 吕凯 李宏 尹新国 |
| |
| 作者单位： | 淮北煤炭师范学院物理系,淮北,235000 |
| |
| 基金项目： | 安徽省自然科学基金项目，安徽省教育厅科技创新团队项目 |
| |
| 摘 要： | 一种密度泛函理论用来研究当4He超流体流速u超过朗道临界流速vc时的不稳定性。发现有稳定的周期性密度波出现,其振幅正比于(u-vc)1/2,其波矢与旋子波矢一致。同时对纳米管道内氦流体进行了计算。
|
| 关 键 词： | 超流 密度分布 |
Density pattern in supercritical flow of liquid ~4He |
| |
| Gong Pifeng,Shan Wei,Zhang Jinfeng,Zhang Zhimin,Lv Kai,Li Hong,Yin Xinguo.Density pattern in supercritical flow of liquid ~4He[J].Cryogenics and Superconductivity,2009,37(6). |
| |
| Authors: | Gong Pifeng Shan Wei Zhang Jinfeng Zhang Zhimin Lv Kai Li Hong Yin Xinguo |
| |
| Institution: | Gong Pifeng,Shan Wei,Zhang Jinfeng,Zhang Zhimin,Lv Kai,Li Hong,Yin Xinguo (Department of Physics Huaibei Coal Industry Teachers College,Huaibei 235000,China) |
| |
| Abstract: | A density functional theory was used to investigate the instability arising in superfluid 4He as it flows at velocity just above the Landau critical velocity of rotons.It is found that a stationary periodic modulation of the density occurs,with amplitude proportional to and wave vector equal to the roton-wave vector.This density pattern was studied for supercritical flow both in bulk helium and in a channel of nanometer cross-section. |
| |
| Keywords: | Supercritical flow Density pattern |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
