The turbulence modelling of a pulsed impinging jet using LES anda divergence free mass flux corrected turbulent inlet

Haines, M. and Taylor, I. (2019) The turbulence modelling of a pulsed impinging jet using LES anda divergence free mass flux corrected turbulent inlet. Journal of Wind Engineering and Industrial Aerodynamics, 188, pp. 338-364. (doi:10.1016/j.jweia.2019.03.009)

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Abstract

This paper examines the best turbulence model to use when using computational fluid dynamics to simulate an impinging jet type flow. The IDDES, k-ω SST SAS, Smagorinsky and dynamic Smagorinsky models were used and compared to data collected from a laboratory impinging jet, developed to simulate thunderstorm downburst flow fields. From this it was found the dynamic Smagorinsky model performed best, especially at capturing the velocities and pressures in the near inlet region. A mesh dependency study was then performed for the dynamic Smagorinsky turbulence model. A small mesh dependency was demonstrated for the mesh densities studied but had issues in capturing the velocity height profile correctly in the near wall region. Despite this issue the model still closely matched the laboratory pressures around a 60mm cube and demonstrated the suitability of this modelling approach for investigating thunderstorm downbursts.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Taylor, Dr Ian
Authors: Haines, M., and Taylor, I.
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:Journal of Wind Engineering and Industrial Aerodynamics
Publisher:Elsevier
ISSN:0167-6105
ISSN (Online):0167-6105
Published Online:18 March 2019
Copyright Holders:Copyright © 2019 Elsevier
First Published:First published in Journal of Wind Engineering and Industrial Aerodynamics 188:338-364
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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