Olivieri, DA, Fairweather, M and Falle, SAEG (2011) Prediction of external intermittency using RANS-based turbulence modelling and a transported PDF approach. Computers and Fluids, 47 (1). 75 - 84. ISSN 0045-7930
Abstract
This paper investigates the modelling of external intermittency in turbulent round jets using a RANS approach coupled to solutions of the transported probability density function (PDF) equation for scalar variables. Solutions to the descriptive equations are obtained using a finite-volume method, combined with an adaptive mesh refinement algorithm, applied in both physical and compositional space. The effects of intermittency on the flow field are accommodated using intermittency-modified eddy viscosity and second-moment turbulence closures, as well as through modifications to the mixing model embodied within the transported PDF equation. Predictions of the model are validated against data on the velocity and scalar fields in jets, as well as against measurements of scalar PDFs and intermittency profiles, with reasonable agreement obtained. From the cases examined, predictions of the second-moment closure are superior, although both approaches provide realistic predictions of the bimodal features to the measured PDFs.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2011, Elsevier. This is an author produced version of a paper published in Computers and Fluids. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Adaptive mesh refinement; Finite-volume method; Intermittency; Reynolds-averaged navier-stokes; Transported pDF |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) > Institute for Particle Science and Engineering (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mathematics (Leeds) > Applied Mathematics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 17 Dec 2014 13:35 |
Last Modified: | 17 Jan 2018 12:08 |
Published Version: | http://dx.doi.org/10.1016/j.compfluid.2011.02.017 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.compfluid.2011.02.017 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:82231 |