Numerical Capture and Validation of a Massively Separated Bluff-Body Wake

Tan, K. J. B., Hesse, H. and Wang, P. C. (2020) Numerical Capture and Validation of a Massively Separated Bluff-Body Wake. In: AIAA Aviation 2020 Forum, 15-19 Jun 2020, ISBN 9781624105982 (doi: 10.2514/6.2020-2713)

221580.pdf - Accepted Version



A flow over a bluff-body is numerically investigated and validated using a Detached-Eddy Simulation (DES) technique at Re=21,400. An incompressible solver that is nominally second-order accurate employing an implicit constant backward time-stepping scheme with blended upwind-central differencing spatial discretization is used to study the massively separated wake that is generated. Measurements are taken up to 6 downstream characteristic lengths, evaluating the wake time-averaged first- and second-moment statistics alongside near-wall boundary layer quantities and surface-force integrals. Results advocate the use of DES methods, which are found to be significantly more accurate for capturing wake statistics, compared to two different Reynolds-Averaged (RANS) models calibrated with an identical grid. Although comparative accuracy can be obtained with the RANS techniques for the boundary layer and surface-forces, these techniques are unsuitable for modeling wake statistics as they are inherently dissipative, evident through early velocity recovery when evaluated against experimental data.

Item Type:Conference Proceedings
Additional Information:The work is funded through the Industrial Postgraduate Programme scholarship by the Economic Development Board of Singapore, in partnership between AviationLearn Pte. Ltd. and the University of Glasgow Singapore.
Glasgow Author(s) Enlighten ID:Hesse, Dr Henrik and Wang, Mr Peng Cheng and Tan, Benjamin
Authors: Tan, K. J. B., Hesse, H., and Wang, P. C.
College/School:College of Science and Engineering > School of Engineering
Published Online:08 June 2020
Copyright Holders:Copyright © 2020 American Institute of Aeronautics
First Published:First published in Proceedings of AIAA Aviation 2020 Forum
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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