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Turbulent flow in a ribbed channel: Flow structures in the vicinity of a rib

Wang, Lei LU ; Salewski, Mirko LU and Sundén, Bengt LU (2010) In Experimental Thermal and Fluid Science 34(2). p.165-176
Abstract
PIV measurements are performed in a channel with periodic ribs on one wall. The emphasis of this study is to investigate the flow

structures in the vicinity of a rib in terms of mean velocities, Reynolds stresses, probability density functions (PDF), and two-point

correlations. The PDF distribution of u0 is bimodal in the separated shear layer downstream of the rib. The maximum Reynolds

shear stresses occur at the leading edge of the rib. Based on quadrant analysis, it is found that ejection motions make a dominant

contribution to the Reynolds shear stress in this region. Moreover, topology-based visualization is applied to the separation bubble

upstream of the rib. Salient critical points and... (More)
PIV measurements are performed in a channel with periodic ribs on one wall. The emphasis of this study is to investigate the flow

structures in the vicinity of a rib in terms of mean velocities, Reynolds stresses, probability density functions (PDF), and two-point

correlations. The PDF distribution of u0 is bimodal in the separated shear layer downstream of the rib. The maximum Reynolds

shear stresses occur at the leading edge of the rib. Based on quadrant analysis, it is found that ejection motions make a dominant

contribution to the Reynolds shear stress in this region. Moreover, topology-based visualization is applied to the separation bubble

upstream of the rib. Salient critical points and limit cycles are extracted, which gives clues to the physical processes occurring in

the flow. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Ribbed channel, Flow separation, PIV, Topology
in
Experimental Thermal and Fluid Science
volume
34
issue
2
pages
165 - 176
publisher
Elsevier
external identifiers
  • wos:000274603000006
  • scopus:74149091546
ISSN
1879-2286
DOI
10.1016/j.expthermflusci.2009.10.005
language
English
LU publication?
yes
id
5eee246b-b1f4-41dd-b861-fb013481f8ab (old id 1524895)
date added to LUP
2010-01-07 10:14:08
date last changed
2018-05-29 10:15:58
@article{5eee246b-b1f4-41dd-b861-fb013481f8ab,
  abstract     = {PIV measurements are performed in a channel with periodic ribs on one wall. The emphasis of this study is to investigate the flow<br/><br>
structures in the vicinity of a rib in terms of mean velocities, Reynolds stresses, probability density functions (PDF), and two-point<br/><br>
correlations. The PDF distribution of u0 is bimodal in the separated shear layer downstream of the rib. The maximum Reynolds<br/><br>
shear stresses occur at the leading edge of the rib. Based on quadrant analysis, it is found that ejection motions make a dominant<br/><br>
contribution to the Reynolds shear stress in this region. Moreover, topology-based visualization is applied to the separation bubble<br/><br>
upstream of the rib. Salient critical points and limit cycles are extracted, which gives clues to the physical processes occurring in<br/><br>
the flow.},
  author       = {Wang, Lei and Salewski, Mirko and Sundén, Bengt},
  issn         = {1879-2286},
  keyword      = {Ribbed channel,Flow separation,PIV,Topology},
  language     = {eng},
  number       = {2},
  pages        = {165--176},
  publisher    = {Elsevier},
  series       = {Experimental Thermal and Fluid Science},
  title        = {Turbulent flow in a ribbed channel: Flow structures in the vicinity of a rib},
  url          = {http://dx.doi.org/10.1016/j.expthermflusci.2009.10.005},
  volume       = {34},
  year         = {2010},
}