孤立した2次元非一様楕円渦のパリンストロフィー生成(渦・回転+大気(1),一般講演)

概要

論文の詳細を見る
Evolution of an isolated 2-D elliptic vortex with non-uniform vorticity distribution is investigated from the viewpoint of the palinstrophy generation. As pointed out in a previous study, the palinstrophy generation rate has a quadrapole structure over the core of the vortex. The palinstrophy generation rate depends on the positive eigenvalue of the rate of strain tensor, the palinstrophy and the alignment angle between the vorticity gradient vector and the eigenvector of the rate of strain tensor associated with the negative eigenvalue. We show that the quadrapole structure over the vortex core, which is pointed out in a previous study, is caused by the alignment angle. We also show that the magnitude of the palinstrophy generation rate is mainly determined by the palinstrophy.
日本流体力学会の論文
2009-09-02