Molecular Tagging Velocimetry in Superfluid Helium-4: Progress, Issues, and Future Development
Molecular Tagging Velocimetry in Superfluid Helium-4: Progress, Issues, and Future Development
复制标题
超流 Helium-4 中的分子标记测速:进展、问题和未来发展
DOI:
10.1007/s10909-018-2102-1
复制
发表时间:
2018
影响因子:
2
通讯作者:
Guo, Wei
中科院分区:
文献类型:
--
作者:
Guo, Wei
Helium-4 in the superfluid phase (He II) is a two-fluid system that exhibits fascinating quantum hydrodynamics with important scientific and engineering applications. However, the lack of high-precision flow measurement tools in He II has impeded the progress in understanding and utilizing its hydrodynamics. In recent years, there have been extensive efforts in developing quantitative flow visualization techniques applicable to He II. In particular, a powerful molecular tagging velocimetry (MTV) technique, based on tracking thin lines ofexcimer molecules created via femtosecond laser-field ionization in helium, has been developed in our laboratory. This technique allows unambiguous measurement of the normal fluid velocity field in the two-fluid system. Nevertheless, there are two limitations to this technique: (1) only the velocity component perpendicular to the tracer line can be measured; and (2) there is an inherent error in determining the perpendicular velocity. In this paper, we discuss how these issues can be resolved by advancing the MTV technique. We also discuss two novel schemes for tagging and producingtracers. The first method allows the creation of a taggedtracer line without the use of an expensive femtosecond laser. The second method enables full-space velocity field measurement through tracking small clouds ofmolecules created via neutron-absorption reactions in He II.
登录
查看更多内容
DOI:
10.1088/0953-8984/11/40/308
发表时间:
1999
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
作者:
L. Skrbek;J. Niemela;R. Donnelly
通讯作者:
R. Donnelly
影响因子:
2
作者:
J. Gao;E. Varga;W. Guo;W. Vinen
通讯作者:
W. Vinen
影响因子:
19.6
作者:
Tao Zhang;S. V. Van Sciver
通讯作者:
S. V. Van Sciver
影响因子:
1.5
作者:
Richard B. Miles;W. Lempert;B. Zhang
通讯作者:
B. Zhang
影响因子:
3.1
作者:
Takeyasu M. Ito;G. Seidel
通讯作者:
G. Seidel