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Variation of friction drag via spanwise transversal surface waves
Author(s) -
Meysonnat Pascal,
Klumpp Stephan,
Meinke Matthias,
Schröder Wolfgang
Publication year - 2013
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201310166
Subject(s) - drag , parasitic drag , turbulence , mechanics , boundary layer , physics , shear stress , materials science , classical mechanics , geology
Abstract The turbulent wall shear stress can be influenced through the introduction of spanwise velocity components in the near‐wall flow field. The underlying physical mechanisms for the drag reduction still remains to be fully understood. Two distinct wave configurations are analyzed and compared to an unactuated turbulent boundary layer to obtain further inside of the drag reducing mechanism using the dynamic mode decomposition. (© 2013 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)