Numerical predictions of low Reynolds number flows over two tandem circular cylinders
(2005) In International Journal for Numerical Methods in Fluids 47(5). p.423-447- Abstract
- Flows over two tandem cylinders were analysed using the newly developed collocated unstructured computational fluid dynamics (CUCFD) code, which is capable of handling complex geometries. A Reynolds number of 100, based on cylinder diameter, was used to ensure that the flow remained laminar. The validity of the code was tested through comparisons with benchmark solutions for flow in a lid-friven cavity and flow around a single cylinder. For the tandem cylinder flow, also mesh convergence was demonstrated, to within a couple of percent for the RMS lift coefficient. The mean and fluctuating lift and drag coefficients were recorded for centre-to-centre cylinder spacings between 2 and 10 diameters. A critical cylinder spacing was found between... (More)
- Flows over two tandem cylinders were analysed using the newly developed collocated unstructured computational fluid dynamics (CUCFD) code, which is capable of handling complex geometries. A Reynolds number of 100, based on cylinder diameter, was used to ensure that the flow remained laminar. The validity of the code was tested through comparisons with benchmark solutions for flow in a lid-friven cavity and flow around a single cylinder. For the tandem cylinder flow, also mesh convergence was demonstrated, to within a couple of percent for the RMS lift coefficient. The mean and fluctuating lift and drag coefficients were recorded for centre-to-centre cylinder spacings between 2 and 10 diameters. A critical cylinder spacing was found between 3.75 and 4 diameters. The fluctuating forces jumped appreciably at the critical spacing. It was found that there exists only one reattachment and one separation point on the downstream cylinder for spacings greater than the critical spacing. The mean and the fluctuating surface pressure distributions were compared as a function of the cylinder spacing. The mean and the fluctuating pressures were significantly different between the upstream and the downstream cylinders. These pressures also differed with the cylinder spacing. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/254874
- author
- Sharman, Bruce ; Lien, FS ; Davidson, Lars and Norberg, Christoffer LU
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- unstructured grid, two tandem circular cylinder, unsteady flows
- in
- International Journal for Numerical Methods in Fluids
- volume
- 47
- issue
- 5
- pages
- 423 - 447
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- wos:000226732300004
- scopus:13444250888
- ISSN
- 1097-0363
- DOI
- 10.1002/fld.812
- language
- English
- LU publication?
- yes
- id
- 5445c6c5-3b44-46c3-b16e-bb290e3fa873 (old id 254874)
- date added to LUP
- 2016-04-01 12:22:38
- date last changed
- 2022-04-21 06:37:52
@article{5445c6c5-3b44-46c3-b16e-bb290e3fa873,
abstract = {{Flows over two tandem cylinders were analysed using the newly developed collocated unstructured computational fluid dynamics (CUCFD) code, which is capable of handling complex geometries. A Reynolds number of 100, based on cylinder diameter, was used to ensure that the flow remained laminar. The validity of the code was tested through comparisons with benchmark solutions for flow in a lid-friven cavity and flow around a single cylinder. For the tandem cylinder flow, also mesh convergence was demonstrated, to within a couple of percent for the RMS lift coefficient. The mean and fluctuating lift and drag coefficients were recorded for centre-to-centre cylinder spacings between 2 and 10 diameters. A critical cylinder spacing was found between 3.75 and 4 diameters. The fluctuating forces jumped appreciably at the critical spacing. It was found that there exists only one reattachment and one separation point on the downstream cylinder for spacings greater than the critical spacing. The mean and the fluctuating surface pressure distributions were compared as a function of the cylinder spacing. The mean and the fluctuating pressures were significantly different between the upstream and the downstream cylinders. These pressures also differed with the cylinder spacing.}},
author = {{Sharman, Bruce and Lien, FS and Davidson, Lars and Norberg, Christoffer}},
issn = {{1097-0363}},
keywords = {{unstructured grid; two tandem circular cylinder; unsteady flows}},
language = {{eng}},
number = {{5}},
pages = {{423--447}},
publisher = {{John Wiley & Sons Inc.}},
series = {{International Journal for Numerical Methods in Fluids}},
title = {{Numerical predictions of low Reynolds number flows over two tandem circular cylinders}},
url = {{http://dx.doi.org/10.1002/fld.812}},
doi = {{10.1002/fld.812}},
volume = {{47}},
year = {{2005}},
}