The University of Southampton
University of Southampton Institutional Repository
Warning ePrints Soton is experiencing an issue with some file downloads not being available. We are working hard to fix this. Please bear with us.

Divergence-free turbulence inflow conditions for large-eddy simulations with incompressible flow solvers Computers and Fluids

Divergence-free turbulence inflow conditions for large-eddy simulations with incompressible flow solvers Computers and Fluids
Divergence-free turbulence inflow conditions for large-eddy simulations with incompressible flow solvers Computers and Fluids
Synthetic turbulence for inflow conditions formulated on a 2-D plane generally produces unphysically large pressure fluctuations in direct numerical and large-eddy simulations. To reduce such artificial
fluctuations a divergencefree method is developed with incompressible flow solvers. The procedure of the velocity-pressure solvers is slightly modified on a vertical plane near (rather than at) the inlet by inserting the synthetic turbulence on that plane during the procedure. Simple analytic and numerical error estimations are used to show that the impact of the modified solvers on solution accuracy is small. The final synthetic turbulence satisfies the divergence-free condition. No additional CPU time is required to achieve this condition. The method was tested via simulations of a plane channel flow with Re_tau = 395. Reynolds stresses, wall skin friction and power spectra of velocity fluctuations are compared with those obtained from
using periodic inlet-outlet boundary conditions. In particular, the variances and power spectra of pressure
fluctuations are shown to be accurately predicted only when the divergence-free inlet condition is used.
inflow condition, divergence-free, pressure fluctuations, peak loading
0045-7930
56-68
Kim, Yusik
5898caed-b9e9-4c9c-84cb-5634b0eec174
Castro, I.P.
66e6330d-d93a-439a-a69b-e061e660de61
Xie, Zheng-Tong
98ced75d-5617-4c2d-b20f-7038c54f4ff0
Kim, Yusik
5898caed-b9e9-4c9c-84cb-5634b0eec174
Castro, I.P.
66e6330d-d93a-439a-a69b-e061e660de61
Xie, Zheng-Tong
98ced75d-5617-4c2d-b20f-7038c54f4ff0

Kim, Yusik, Castro, I.P. and Xie, Zheng-Tong (2013) Divergence-free turbulence inflow conditions for large-eddy simulations with incompressible flow solvers Computers and Fluids. Computers & Fluids, 84, 56-68. (doi:10.1016/j.compfluid.2013.06.001).

Record type: Article

Abstract

Synthetic turbulence for inflow conditions formulated on a 2-D plane generally produces unphysically large pressure fluctuations in direct numerical and large-eddy simulations. To reduce such artificial
fluctuations a divergencefree method is developed with incompressible flow solvers. The procedure of the velocity-pressure solvers is slightly modified on a vertical plane near (rather than at) the inlet by inserting the synthetic turbulence on that plane during the procedure. Simple analytic and numerical error estimations are used to show that the impact of the modified solvers on solution accuracy is small. The final synthetic turbulence satisfies the divergence-free condition. No additional CPU time is required to achieve this condition. The method was tested via simulations of a plane channel flow with Re_tau = 395. Reynolds stresses, wall skin friction and power spectra of velocity fluctuations are compared with those obtained from
using periodic inlet-outlet boundary conditions. In particular, the variances and power spectra of pressure
fluctuations are shown to be accurately predicted only when the divergence-free inlet condition is used.

Text
cnf2013b.pdf - Author's Original
Download (854kB)

More information

Published date: June 2013
Keywords: inflow condition, divergence-free, pressure fluctuations, peak loading
Organisations: Aerodynamics & Flight Mechanics Group

Identifiers

Local EPrints ID: 341146
URI: http://eprints.soton.ac.uk/id/eprint/341146
ISSN: 0045-7930
PURE UUID: d68633f9-6b5d-4ad8-be9f-05424c853512
ORCID for Zheng-Tong Xie: ORCID iD orcid.org/0000-0002-8119-7532

Catalogue record

Date deposited: 16 Jul 2012 11:08
Last modified: 21 Nov 2021 02:55

Export record

Altmetrics

Contributors

Author: Yusik Kim
Author: I.P. Castro
Author: Zheng-Tong Xie ORCID iD

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.

×