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
O. Ishikawa
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
N. Kakimoto;K. Obara;H.Yano;O. Ishikawa

文献摘要

参考文献

相似文献

虽然吸力涡是最常见的旋涡之一,但对其流动结构还没有完全了解。造成这一现象的主要原因是由于堆芯附近的流量变化非常快,导致实验上的困难。然而,超流氦可能有助于我们更好地理解吸力涡旋,因为超流氦中的流动可以用第一声速测量的环流来表征,并且可以用第二声衰减技术来测量量子化涡旋线的形状,正如我们以前的结果(Obara等人)所报道的那样。在Phys Rev流体中6:064802,2021年)。在这篇文章中,我们报告了一种使用基于相关的差分飞行时间方法的超声循环测量仪的有效性。利用这种技术,大大提高了测量循环的精度;我们发现循环与涡轮的转速成正比,这可以通过考虑流体中总角动量的输运和耗散来解释。
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.
低温电机引起的超流体 4He 流动的观察
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