The University of Southampton
University of Southampton Institutional Repository

Unsteady simulations of the flow around a short surface-mounted cylinder

Unsteady simulations of the flow around a short surface-mounted cylinder
Unsteady simulations of the flow around a short surface-mounted cylinder
The flow around a surface-mounted circular cylinder, of height/diameter ratio 1 with a free end, is simulated using large-eddy simulation (LES) and detached-eddy simulation (DES) at a Reynolds number based on diameter of 200 000. A comparison is made between the abilities of the two models to capture flow features observed in particle image velocimetry (PIV) experiments carried out by the authors. The flow contains three interacting features formed from the junction flow between the cylinder and the ground, separation from the cylinder wall and resultant turbulent wake, and the flow over the free-end of the cylinder. Both LES and DES overpredict the length of the recirculation region by 30%, but the turbulence quantities are close to the measured values. The topology of the flow over the free-end is confirmed as consisting of an arch or 'mushroom' vortex. Due to the high Reynolds number the grid resolution is insufficient to resolve the approaching ground-plane boundary layer flow with LES, leading to inaccuracies in the horseshoe vortex system. The DES model improves this area, though still has grid induced separation effects.
large-eddy simulation, detached-eddy simulation, finite cylinder
895-914
Pattenden, R.J.
53740e3d-70d8-42ae-b568-d73f733bf936
Bressloff, N.W.
4f531e64-dbb3-41e3-a5d3-e6a5a7a77c92
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Zhang, X.
3056a795-80f7-4bbd-9c75-ecbc93085421
Pattenden, R.J.
53740e3d-70d8-42ae-b568-d73f733bf936
Bressloff, N.W.
4f531e64-dbb3-41e3-a5d3-e6a5a7a77c92
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Zhang, X.
3056a795-80f7-4bbd-9c75-ecbc93085421

Pattenden, R.J., Bressloff, N.W., Turnock, S.R. and Zhang, X. (2007) Unsteady simulations of the flow around a short surface-mounted cylinder. International Journal for Numerical Methods in Fluids, 53 (6), 895-914. (doi:10.1002/fld.1309).

Record type: Article

Abstract

The flow around a surface-mounted circular cylinder, of height/diameter ratio 1 with a free end, is simulated using large-eddy simulation (LES) and detached-eddy simulation (DES) at a Reynolds number based on diameter of 200 000. A comparison is made between the abilities of the two models to capture flow features observed in particle image velocimetry (PIV) experiments carried out by the authors. The flow contains three interacting features formed from the junction flow between the cylinder and the ground, separation from the cylinder wall and resultant turbulent wake, and the flow over the free-end of the cylinder. Both LES and DES overpredict the length of the recirculation region by 30%, but the turbulence quantities are close to the measured values. The topology of the flow over the free-end is confirmed as consisting of an arch or 'mushroom' vortex. Due to the high Reynolds number the grid resolution is insufficient to resolve the approaching ground-plane boundary layer flow with LES, leading to inaccuracies in the horseshoe vortex system. The DES model improves this area, though still has grid induced separation effects.

Full text not available from this repository.

More information

Published date: 2007
Keywords: large-eddy simulation, detached-eddy simulation, finite cylinder

Identifiers

Local EPrints ID: 45160
URI: http://eprints.soton.ac.uk/id/eprint/45160
PURE UUID: b59e3517-9035-4d59-8fc8-fc447332e2e8
ORCID for S.R. Turnock: ORCID iD orcid.org/0000-0001-6288-0400

Catalogue record

Date deposited: 16 Apr 2007
Last modified: 03 Dec 2019 02:06

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×