並列タイトル等Definition of swirl function and its appliation to identification method of swirling motion
タイトル（掲載誌）総合技術研究所研究報告=Bulletin of Research Institute for Industrial Technology.
一般注記A method of identification of swirling motion, with swirl function defined in this paper, and its application are presented. Flow characteristic can be classified with eigenvalue of velocity gradient tensor, and complex eigenvalue indicates that flow is swirling motion. Here the imaginary part of the complex eigenvalue is defined as swirl function, and the local maximum point of swirling function is assumed to be the axis of swirling motion. The swirl function can be considered as a physical property which corresponds to angular velocity of swirling, which is invariant in transformation of coordinate. This method enables to identify the swirling motion hidden in complicated flow, which is difficult to identify with velocity field or streamline, and also estimate the intensity of swirling.
identifier:http://repository.aitech.ac.jp/dspace/handle/11133/1669
一次資料へのリンクURLhttp://repository.aitech.ac.jp/dspace/bitstream/11133/1669/1/%e7%b7%8f%e7%a0%949%e5%8f%b7%28P117-124%29.pdf
連携機関・データベース国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）