Circulation of Superfluid Suction Vortex
Circulation of Superfluid Suction Vortex
复制标题
超流体吸力涡流循环
DOI:
10.1007/s10909-022-02684-1
复制
发表时间:
2022
影响因子:
2
通讯作者:
O. Ishikawa
中科院分区:
文献类型:
--
作者:
N. Kakimoto;K. Obara;H.Yano;O. Ishikawa
Although the suction vortex is the one of the most common vortices, its flow structure has not been fully understood. The main reasons for this are the experimental difficulty due to the very rapid flow change near the core. However, superfluid helium may help us better understand the suction vortex, because the flow in the superfluid helium can be characterized by the circulation measured by the first sound velocity, and the configuration of the quantized vortex lines can be measured with the second sound attenuation technique, as reported in our previous results (Obara et al. in Phys Rev Fluids 6:064802, 2021). In this paper, we report the effectiveness of an ultrasound circulation meter using the correlation-based differential time-of-flight method. Using this technique, the accuracy for measuring the circulation was greatly improved; we found that the circulation was proportional to the rotation speed of the turbine, which can be interpreted by considering the transport and dissipation of total angular momentum in the fluid.
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
H. Yano;K. Ohyama;K. Obara;O. Ishikawa;and T. Hata
通讯作者:
and T. Hata
DOI:
--
发表时间:
2021
期刊:
影响因子:
--
作者:
S. Shimamura;N. Kakimoto;K. Ohyama;K.Obara;H.Yano and O.Ishikawa
通讯作者:
H.Yano and O.Ishikawa