Turbulent flow in a ribbed channel: Flow structures in the vicinity of a rib
(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:
https://lup.lub.lu.se/record/1524895
- author
- Wang, Lei LU ; Salewski, Mirko LU and Sundén, Bengt LU
- organization
- publishing date
- 2010
- 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
- 2016-04-01 10:46:10
- date last changed
- 2022-03-27 19:19:31
@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}},
keywords = {{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 = {{https://lup.lub.lu.se/search/files/2118383/1524899.pdf}},
doi = {{10.1016/j.expthermflusci.2009.10.005}},
volume = {{34}},
year = {{2010}},
}