Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 03, 2023 - September 06, 2023
In our previous studies, it was shown that when the reconnection of two vortex rings occurred, one curvature peak appeared on the vortex ring, which splitted into two curvature peaks at a certain time. Such a stage was defined as the occurrence of the reconnection. In this study, the peak value of curvature at the time of splitting was defined as the critical curvature, and the effects of three parameters (vortex core diameter, vortex ring diameter, and circulation) on the critical curvature were investigated numerically. As a result, the critical curvature was independent on the circulation. In addition, the dependences of the critical curvature on the vortex core diameter and the vortex ring diameter were investigated, and the critical condition for the non-dimensional quantity (the critical curvature multiplied by the vortex core diameter) was obtained. Using such a critical condition etc., the occurrences of the reconnection and the turbulence were discussed.
