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Article
Large-scale friction control in turbulent wall flow
| Authors: |
Schlatter, P., Örlü, R., Chin, C., Hutchins, N., Monty, J. |
| Document Type: |
Conference |
| Pubstate: |
Published |
| Journal: |
Proc. 9th Turbulence Shear Flow Phenomena (TSFP-9), June 30 - July 3, 2015, The University of Melbourne, Australia |
| Volume: |
3
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| Year: |
2015 |
AbstractThe present study reconsiders the control scheme pro- posed by Schoppa & Hussain [Phys Fluids 10:1049–1051 (1998)], using new sets of numerical simulations in a turbulent channel at a friction Reynolds number of 180. In particular, it is aimed at better characterising the physics of the control as well as investigate the optimal parameters. Results indicate that a clear maximum efficiency in drag reduction is reached for the case with a viscous-scaled spanwise wavelength of the vortices of 1200, which yields a drag reduction of 18%, contrary to the smaller wavelength of 400 suggested as the most efficient vortex in Schoppa & Hussain.
http://www.tsfp-conference.org/proceedings/2015/v3/9A-2.pdf
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