The University of Southampton
University of Southampton Institutional Repository

Analysis of two-dimensional and three-dimensional wakes of long circular cylinders

Analysis of two-dimensional and three-dimensional wakes of long circular cylinders
Analysis of two-dimensional and three-dimensional wakes of long circular cylinders
The wake behind a bluff body constitutes an intrinsically three-dimensional flow and it is known that two-dimensional simulations yield to an unphysical prediction of the body forces because of the nature of the two-dimensional Navier-Stokes equations. However, three-dimensional simulations are too computationally expensive for cases such as marine risers, which have very large aspect ratios and are exposed to a high Reynolds number flow. A quantitative and qualitative study has been performed to investigate the fundamental differences on the wake of two-dimensional and three-dimensional fixed spanwise periodic cylinders for a Reynolds number of 10000 . A very fine unifrom grid (503M points) has been used for the near and mid wake range, and it is shown that the wake presents very different vortical structures when the spanwise dimensionality is omitted. In this case, forces such as lift and drag are overpredicted. The kinetic energy spectra of the flow is also investigated to further discuss the physics inherent of each case together and it is found that the contribution of the spanwise velocity on the large wavenumbers is significantly smaller than the other velocity components.
marine risers, computational fluid dynamics, two-dimensional turbulence, strip theory
Font Garcia, Bernat
1c605529-b50d-4703-b8cc-4ccaa5dff7fc
Weymouth, Gabriel
b0c85fda-dfed-44da-8cc4-9e0cc88e2ca0
Tutty, Owen
c9ba0b98-4790-4a72-b5b7-09c1c6e20375
Font Garcia, Bernat
1c605529-b50d-4703-b8cc-4ccaa5dff7fc
Weymouth, Gabriel
b0c85fda-dfed-44da-8cc4-9e0cc88e2ca0
Tutty, Owen
c9ba0b98-4790-4a72-b5b7-09c1c6e20375

Font Garcia, Bernat, Weymouth, Gabriel and Tutty, Owen (2017) Analysis of two-dimensional and three-dimensional wakes of long circular cylinders. OCEANS'17 MTS/IEEE, Aberdeen, Aberdeen, United Kingdom. 18 - 22 Jun 2017. 8 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

The wake behind a bluff body constitutes an intrinsically three-dimensional flow and it is known that two-dimensional simulations yield to an unphysical prediction of the body forces because of the nature of the two-dimensional Navier-Stokes equations. However, three-dimensional simulations are too computationally expensive for cases such as marine risers, which have very large aspect ratios and are exposed to a high Reynolds number flow. A quantitative and qualitative study has been performed to investigate the fundamental differences on the wake of two-dimensional and three-dimensional fixed spanwise periodic cylinders for a Reynolds number of 10000 . A very fine unifrom grid (503M points) has been used for the near and mid wake range, and it is shown that the wake presents very different vortical structures when the spanwise dimensionality is omitted. In this case, forces such as lift and drag are overpredicted. The kinetic energy spectra of the flow is also investigated to further discuss the physics inherent of each case together and it is found that the contribution of the spanwise velocity on the large wavenumbers is significantly smaller than the other velocity components.

Text
Font_Garcia_et_al 2017 - Analysis of two-dimensional and three-dimensional wakes of long circular cylinders - Accepted Manuscript
Download (9MB)

More information

Accepted/In Press date: 1 April 2017
Published date: June 2017
Venue - Dates: OCEANS'17 MTS/IEEE, Aberdeen, Aberdeen, United Kingdom, 2017-06-18 - 2017-06-22
Keywords: marine risers, computational fluid dynamics, two-dimensional turbulence, strip theory
Organisations: Fluid Structure Interactions Group, Aerodynamics & Flight Mechanics Group, Education Hub

Identifiers

Local EPrints ID: 411819
URI: http://eprints.soton.ac.uk/id/eprint/411819
PURE UUID: 6b815a6f-6ee8-4a19-b411-6f319b9738cb
ORCID for Bernat Font Garcia: ORCID iD orcid.org/0000-0002-2136-3068
ORCID for Gabriel Weymouth: ORCID iD orcid.org/0000-0001-5080-5016

Catalogue record

Date deposited: 26 Jun 2017 16:31
Last modified: 09 Jan 2022 05:30

Export record

Contributors

Author: Bernat Font Garcia ORCID iD
Author: Owen Tutty

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.

×