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Turbulent flow in a ribbed channel analysed by the proper orhtogonal decomposition

Wang, Lei LU ; Salewski, Mirko LU and Sundén, Bengt LU (2009) ExHFT-7 7th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics p.1-1
Abstract
Particle image velocimetry (PIV) measurements and proper orthogonal decomposition (POD) are used to explore the turbulent structures in a ribbed channel. In this study, only one channel wall is equipped with square ribs which are oriented transversely to the main stream direction. The ribs obstruct the channel by 20% of its height and are arranged 10 rib heights apart. The results include mean streamlines, Reynolds shear stresses, two-point correlation coefficients, POD eigenvalues and eigenfunctions. By means of the POD analysis, the underlying flow features are identified, which are the strong upward ejections from the leading edge of the rib. Essentially, these motions give rise to the sharp peaks in the fluctuating turbulent kinetic... (More)
Particle image velocimetry (PIV) measurements and proper orthogonal decomposition (POD) are used to explore the turbulent structures in a ribbed channel. In this study, only one channel wall is equipped with square ribs which are oriented transversely to the main stream direction. The ribs obstruct the channel by 20% of its height and are arranged 10 rib heights apart. The results include mean streamlines, Reynolds shear stresses, two-point correlation coefficients, POD eigenvalues and eigenfunctions. By means of the POD analysis, the underlying flow features are identified, which are the strong upward ejections from the leading edge of the rib. Essentially, these motions give rise to the sharp peaks in the fluctuating turbulent kinetic energy and make great contributions to the Reynolds shear stress. (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
Particle image velocimetry, proper orthogonal decomposition
host publication
[Host publication title missing]
editor
Szmyd, J. S. ; Spalek, J and Kowalewski, T.A.
pages
1 - 1
publisher
AHG University of Science and Technology Press
conference name
ExHFT-7 7th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics
conference location
Krakow, Poland
conference dates
2009-06-28 - 2009-07-03
ISBN
978-83-7464-235-4
language
English
LU publication?
yes
id
6d821e24-3483-4c06-be68-ff322f456eea (old id 1487550)
date added to LUP
2016-04-04 10:34:44
date last changed
2018-11-21 20:59:34
@inproceedings{6d821e24-3483-4c06-be68-ff322f456eea,
  abstract     = {Particle image velocimetry (PIV) measurements and proper orthogonal decomposition (POD) are used to explore the turbulent structures in a ribbed channel. In this study, only one channel wall is equipped with square ribs which are oriented transversely to the main stream direction. The ribs obstruct the channel by 20% of its height and are arranged 10 rib heights apart. The results include mean streamlines, Reynolds shear stresses, two-point correlation coefficients, POD eigenvalues and eigenfunctions. By means of the POD analysis, the underlying flow features are identified, which are the strong upward ejections from the leading edge of the rib. Essentially, these motions give rise to the sharp peaks in the fluctuating turbulent kinetic energy and make great contributions to the Reynolds shear stress.},
  author       = {Wang, Lei and Salewski, Mirko and Sundén, Bengt},
  booktitle    = {[Host publication title missing]},
  editor       = {Szmyd, J. S. and Spalek, J and Kowalewski, T.A.},
  isbn         = {978-83-7464-235-4},
  language     = {eng},
  pages        = {1--1},
  publisher    = {AHG University of Science and Technology Press},
  title        = {Turbulent flow in a ribbed channel analysed by the proper orhtogonal decomposition},
  year         = {2009},
}