Swirl switching in turbulent flow through 90 degrees pipe bends
(2015) In Physics of Fluids 27(8).- Abstract
- Turbulent flow through 90 degrees pipe bends, for four different curvatures, has been investigated using large eddy simulations. In particular, the origin of the so-called swirl switching phenomenon, which is a large scale oscillation of the flow after the bend, has been studied for different bend curvature ratios. A classification of the phenomenon into a high and a low frequency switching, with two distinct physical origins, is proposed. While the high frequency switching stems from modes formed at the bend, and becomes increasingly important for sharp curvatures, the low frequency switching originates from very-large-scale motions created in the upstream pipe flow. (C) 2015 Author(s). All article content, except where otherwise noted,... (More)
- Turbulent flow through 90 degrees pipe bends, for four different curvatures, has been investigated using large eddy simulations. In particular, the origin of the so-called swirl switching phenomenon, which is a large scale oscillation of the flow after the bend, has been studied for different bend curvature ratios. A classification of the phenomenon into a high and a low frequency switching, with two distinct physical origins, is proposed. While the high frequency switching stems from modes formed at the bend, and becomes increasingly important for sharp curvatures, the low frequency switching originates from very-large-scale motions created in the upstream pipe flow. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/8080536
- author
- Carlsson, Christian LU ; Alenius, Emma LU and Fuchs, Laszlo LU
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physics of Fluids
- volume
- 27
- issue
- 8
- article number
- 085112
- publisher
- American Institute of Physics (AIP)
- external identifiers
-
- wos:000360646600042
- scopus:84940399376
- ISSN
- 1070-6631
- DOI
- 10.1063/1.4928971
- language
- English
- LU publication?
- yes
- id
- fdad2225-f760-4bd7-b0f2-b14c5a222532 (old id 8080536)
- date added to LUP
- 2016-04-01 11:00:41
- date last changed
- 2022-04-28 03:47:38
@article{fdad2225-f760-4bd7-b0f2-b14c5a222532,
abstract = {{Turbulent flow through 90 degrees pipe bends, for four different curvatures, has been investigated using large eddy simulations. In particular, the origin of the so-called swirl switching phenomenon, which is a large scale oscillation of the flow after the bend, has been studied for different bend curvature ratios. A classification of the phenomenon into a high and a low frequency switching, with two distinct physical origins, is proposed. While the high frequency switching stems from modes formed at the bend, and becomes increasingly important for sharp curvatures, the low frequency switching originates from very-large-scale motions created in the upstream pipe flow. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.}},
author = {{Carlsson, Christian and Alenius, Emma and Fuchs, Laszlo}},
issn = {{1070-6631}},
language = {{eng}},
number = {{8}},
publisher = {{American Institute of Physics (AIP)}},
series = {{Physics of Fluids}},
title = {{Swirl switching in turbulent flow through 90 degrees pipe bends}},
url = {{http://dx.doi.org/10.1063/1.4928971}},
doi = {{10.1063/1.4928971}},
volume = {{27}},
year = {{2015}},
}