Extraction of multi-scale vortical structures from a homogeneous isotropic turbulence

Waleed Abdel Kareem, Seiichiro Izawa, Ao Kui Xiong, Yu Fukunishi

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

An attempt to extract multi-scaled vortical structures from a turbulent field is carried out. The Lattice Boltzmann method with forcing is used to generate a statistically stationary velocity field in a resolution of 256 3. Two methods for filtering, namely the Fourier and wavelet decompositions, are used in the investigation and the results are compared. Three fields that contain vortical structures of different-scales area extracted from the original turbulent field. It is found that the results obtained by the two methods overlap at a high rate. Several universal characteristics among the filtered flow fields are found in the comparisons using the invariants of the velocity gradient, rotation and deformation tensors.

本文言語English
ホスト出版物のタイトルIUTAM Symposium on Computational Physics and New Perspectives in Turbulence - Proceedings of the IUTAM Symposium on Computational Physics and New Perspectives in Turbulence
ページ143-148
ページ数6
DOI
出版ステータスPublished - 2008 12 1
イベントIUTAM Symposium on Computational Physics and New Perspectives in Turbulence - Nagoya, Japan
継続期間: 2006 9 112006 9 14

出版物シリーズ

名前Solid Mechanics and its Applications
4
ISSN(印刷版)1875-3507

Other

OtherIUTAM Symposium on Computational Physics and New Perspectives in Turbulence
国/地域Japan
CityNagoya
Period06/9/1106/9/14

ASJC Scopus subject areas

  • 土木構造工学
  • 自動車工学
  • 航空宇宙工学
  • 音響学および超音波学
  • 機械工学

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