%0 Journal Article
%T Experimental Study on Vortex Growth during the Early Development of Rotating Disks
%A Hiroyuki Furukawa
%A Takeomi Yamazaki
%J World Journal of Mechanics
%P 41-50
%@ 2160-0503
%D 2022
%I Scientific Research Publishing
%R 10.4236/wjm.2022.123003
%X In
previous studies, the effects of radial clearance on the flow of a rotating
disk in a cylindrical vessel have been investigated by using rotating disks of
different shapes. As a result, different flow phases were observed in each disk <span>due to the difference in disk dimensions. In
this study, we focus on the end-face</span> effect and conduct experiments to
visualize the vortex growth process and elucidate the generation mechanism of
the vortex structure. From the experiment results, at Re = 4000, 7000, and 9000, four types of vortex flow modes
appeared in the vortex development process. However, at Re = 4000, only regular 2-cells and regular 4-cells appeared,
and at Re = 9000, only mutated 2-cells and mutated 3-cells appeared. In
addition, it was found that only one type appeared depending on the rotational
ascent time <i>t</i><sub>s</sub>. When Re
= 4000, the rotational ascent time <i>t</i><sub>s</sub> = 0, 2, 7, and 8
was stable at regular 4-cells, while the others were finally stable in regular
2-cells. This study revealed the influence of the acceleration of the rotating
disk on the non-unique flows in the cylindrical casing.
%K Rotating Disk
%K Experimental Study
%K Flow Instability
%K Non-Uniqueness
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=118353