Detection of coherent structures in an open-channel cavity flow using wavelet transforms

研究成果: Conference contribution

抄録

In the present paper, organized turbulent motions in an open-channel cavity flow are examined by using wavelet transforms. Experimental data of velocity vectors are obtained by particle image velocimetry (PIV). At first, a multiresolution approximation (MRA) is employed to decompose the PIV velocity data into components of the organized turbulence and the mean flow structures. Then, distributions of an instantaneous Reynolds stress in the organized turbulence are analyzed using a two-dimensional continuous wavelet transform (2D-CWT) in order to detect the coherent structures with their spatial scales and locations. From the results of the wavelet analyses, behaviour of the organized motions along the mixing layer of the open-channel cavity, such as the evolution of the spatial scale and advection velocity, are discussed in different hydraulic conditions.

本文言語English
ホスト出版物のタイトル4th World Congress in Industrial Process Tomography
出版社International Society for Industrial Process Tomography
ページ1036-1041
ページ数6
ISBN(電子版)9780853163206
出版ステータスPublished - 2005 1月 1
外部発表はい
イベント4th World Congress in Industrial Process Tomography - Aizu, Japan
継続期間: 2005 9月 52005 9月 5

出版物シリーズ

名前4th World Congress in Industrial Process Tomography

Conference

Conference4th World Congress in Industrial Process Tomography
国/地域Japan
CityAizu
Period05/9/505/9/5

ASJC Scopus subject areas

  • 制御およびシステム工学
  • 計算力学
  • コンピュータ ビジョンおよびパターン認識
  • コンピュータ サイエンスの応用

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