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Effect of a standing baffle on the flow structure in a rectangular open channel

Jamshidnia, H ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1080/00221681003726296
  3. Publisher: 2010
  4. Abstract:
  5. The effect of an intermediate standing baffle on the flow structure in a rectangular open channel has been investigated by a three-dimensional acoustic Doppler velocimeter. Investigation of time-averaged velocity profiles at different streamwise positions reveals that the approach flow is fully developed upstream of the baffle. By analysing the space-averaged power spectra of streamwise velocity, a peak structure was observed in the upstream baffle region. Downstream of the baffle this peak structure has been alleviated by the baffle. The same analysis for the vertical component indicates the existence of a peak structure both up- and downstream of the baffle. Consequently, a baffle affects the streamwise energy dissipation but not the vertical energy dissipation
  6. Keywords:
  7. Baffle ; Power spectra ; Acoustic Doppler velocimetry ; Approach flow ; Open channels ; Peak structure ; Power-spectra ; Spatial structure ; Streamwise velocity ; Temporal structures ; Time-averaged velocity ; Vertical component ; Doppler effect ; Electron energy loss spectroscopy ; Energy dissipation ; Energy dissipators ; Flow structure ; Power spectrum ; Velocimeters ; Velocity measurement ; Open channel flow ; Acoustic method ; Flow measurement ; Flow velocity ; Spatiotemporal analysis
  8. Source: Journal of Hydraulic Research ; Volume 48, Issue 3 , Jun , 2010 , Pages 400-404 ; 00221686 (ISSN)
  9. URL: http://www.tandfonline.com/doi/abs/10.1080/00221681003726296