Simulation of a large-eddy-break-up device (LEBU) in a moderate Reynolds number turbulent boundary layer
Chin C, Hutchins N, Orlu R, Monty J, Ooi A, Schlatter P (2015)
Publication Type: Conference contribution
Publication year: 2015
Publisher: TSFP-9
Book Volume: 1
Conference Proceedings Title: 9th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2015
Event location: Melbourne, VIC, AUS
ISBN: 9780000000002
Abstract
A well-resolved large eddy simulation (LES) of a large-eddy break-up (LEBU) device in a spatially evolving turbulent boundary layer up to Reθ ∼ 4300 is performed. The LEBU is a flat plate that is implemented via an immersed boundary method. Initial flow visualizations show successful implementation of the LEBU. The LEBU is located at a wall-normal distance of 0.85 (local boundary layer thickness) from the wall and acts to delay the growth of the turbulent boundary layer. The LEBU serves to reduce skin friction drag up to 1605 downstream of the LEBU but no net drag reduction is found. Investigation is performed on the interactions of high and low momentum bulges with the LEBU and the corresponding output is analysed, showing a 'break-up' of these large momentum bulges. In addition, results show an attenuated turbulence intensity profile downstream of the LEBU, which is mainly due to a reduction in energy at spanwise length scales of λ
Authors with CRIS profile
Involved external institutions
The University of Melbourne
Australia (AU)
Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH)
Sweden (SE)
Australia (AU)
Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH)
Sweden (SE)
How to cite
APA:
Chin, C., Hutchins, N., Orlu, R., Monty, J., Ooi, A., & Schlatter, P. (2015). Simulation of a large-eddy-break-up device (LEBU) in a moderate Reynolds number turbulent boundary layer. In 9th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2015. Melbourne, VIC, AUS: TSFP-9.
MLA:
Chin, Cheng, et al. "Simulation of a large-eddy-break-up device (LEBU) in a moderate Reynolds number turbulent boundary layer." Proceedings of the 9th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2015, Melbourne, VIC, AUS TSFP-9, 2015.
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