Numerical detection of a new instability mode of a vortex ring

Yuji Hattori, Yasuhide Fukumoto

研究成果: Conference contribution

抄録

The instability of a vortex ring is studied by direct numerical simulation of the Naviev-Stokes equations. First we consider a vortex ring in a periodic cylindrical domain. The Widnall instability of bending waves is ohseived clearly. Next we consider a vortex ring confined in a torus. A novel method for solving the Navier-Stokes equations with high accuracy in a fonts is developed and used in the simulation. The curvature instability, which is found by the authors recently, is captured for the first time. The growth rate of unstable modes agrees well with the value obtained by linear stability analysis. The structure of destabilized vortex ring is investigated in detail.

本文言語English
ホスト出版物のタイトル2007 Proceedings of the 5th Joint ASME/JSME Fluids Engineering Summer Conference, FEDSM 2007
ページ1111-1118
ページ数8
PART B
DOI
出版ステータスPublished - 2007 12月 1
外部発表はい
イベント2007 5th Joint ASME/JSME Fluids Engineering Summer Conference, FEDSM 2007 - San Diego, CA, United States
継続期間: 2007 7月 302007 8月 2

出版物シリーズ

名前2007 Proceedings of the 5th Joint ASME/JSME Fluids Engineering Summer Conference, FEDSM 2007
番号PART B
1 SYMPOSIA

Other

Other2007 5th Joint ASME/JSME Fluids Engineering Summer Conference, FEDSM 2007
国/地域United States
CitySan Diego, CA
Period07/7/3007/8/2

ASJC Scopus subject areas

  • 機械工学
  • 凝縮系物理学

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