Self-similar shedding of vortex rings
Self-similar shedding of vortex rings
复制标题
涡环的自相似脱落
DOI：
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发表时间：
2001
影响因子：
3.7
通讯作者：
M. Nitsche
中科院分区：
文献类型：
--
作者：
M. Nitsche
用涡团法计算了初始球形涡面卷起成涡环的过程。环将大约30%的循环流到尾部，尾部又卷起来形成环，从而减少循环。这个过程以自相似的方式在越来越小的尺度上重复。研究了旋涡脱落与旋涡能量的关系。相反，一个最初的圆柱形涡面卷起成为一个涡对，基本上不脱落环流。
The roll-up of an initially spherical vortex sheet into a vortex ring is computed using the vortex blob method. The ring sheds about 30% of its circulation into a tail which, in turn, rolls up into a ring that sheds circulation. The process repeats itself at smaller and smaller scales in a self-similar manner. The relation between the vortex shedding and the energy of the vortices is investigated. In contrast, an initially cylindrical vortex sheet rolls up into a vortex pair that sheds essentially no circulation.