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Experimental investigation of flow fields in a square channel roughened with various ribs on one wall

Wang, L ; Burgers, S.S. ; Verbeek, M.M.J.F. and Sundén, Bengt LU (2006) 2006 ASME International Mechanical Engineering Congress and Exposition, IMECE2006
Abstract
The present work studies the separated flow in a square channel with ribs on one wall by using the PIV method. In this study, the spacing between ribs is kept constant and the heights of rib are varied in order to investigate the influence of the pitch-to-height ratio, P/e on the flow structures. Depending on the various pitch ratios, the enclosure between ribs can be regarded as closed or open cavity. Results are included for mean velocity, streamlines, skin-friction coefficient, anisotropy parameter, turbulent kinetic energy production and two-point correlation. It is found that the separated shear layer in the closed cavity has strong momentum exchange with the mainstream. By contrast, the fluid contained in the open cavity is... (More)
The present work studies the separated flow in a square channel with ribs on one wall by using the PIV method. In this study, the spacing between ribs is kept constant and the heights of rib are varied in order to investigate the influence of the pitch-to-height ratio, P/e on the flow structures. Depending on the various pitch ratios, the enclosure between ribs can be regarded as closed or open cavity. Results are included for mean velocity, streamlines, skin-friction coefficient, anisotropy parameter, turbulent kinetic energy production and two-point correlation. It is found that the separated shear layer in the closed cavity has strong momentum exchange with the mainstream. By contrast, the fluid contained in the open cavity is self-sustained and the outside streamlines are almost parallel to the bottom wall. Moreover, for the open cavity, the velocity fluctuations become vigorous as the flow reattaches directly on the trailing edge. Copyright (Less)
Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Velocity fluctuations, Momentum exchange, Square channel, Pitch-to-height ratio
host publication
American Society of Mechanical Engineers, Fluids Engineering Division FED
pages
7 pages
publisher
American Society Of Mechanical Engineers (ASME)
conference name
2006 ASME International Mechanical Engineering Congress and Exposition, IMECE2006
conference location
Chicago, IL, United States
conference dates
2006-11-05 - 2006-11-10
external identifiers
  • scopus:84920633776
ISSN
0888-8116
ISBN
0791837904
language
English
LU publication?
yes
id
bed655b5-90d0-4fa7-b6f4-c7de00677cea (old id 617035)
date added to LUP
2016-04-01 16:01:43
date last changed
2020-01-12 18:57:51
@inproceedings{bed655b5-90d0-4fa7-b6f4-c7de00677cea,
  abstract     = {The present work studies the separated flow in a square channel with ribs on one wall by using the PIV method. In this study, the spacing between ribs is kept constant and the heights of rib are varied in order to investigate the influence of the pitch-to-height ratio, P/e on the flow structures. Depending on the various pitch ratios, the enclosure between ribs can be regarded as closed or open cavity. Results are included for mean velocity, streamlines, skin-friction coefficient, anisotropy parameter, turbulent kinetic energy production and two-point correlation. It is found that the separated shear layer in the closed cavity has strong momentum exchange with the mainstream. By contrast, the fluid contained in the open cavity is self-sustained and the outside streamlines are almost parallel to the bottom wall. Moreover, for the open cavity, the velocity fluctuations become vigorous as the flow reattaches directly on the trailing edge. Copyright},
  author       = {Wang, L and Burgers, S.S. and Verbeek, M.M.J.F. and Sundén, Bengt},
  booktitle    = {American Society of Mechanical Engineers, Fluids Engineering Division FED},
  isbn         = {0791837904},
  issn         = {0888-8116},
  language     = {eng},
  publisher    = {American Society Of Mechanical Engineers (ASME)},
  title        = {Experimental investigation of flow fields in a square channel roughened with various ribs on one wall},
  year         = {2006},
}