Abo Bibliothek: Guest
Digitales Portal Digitale Bibliothek eBooks Zeitschriften Referenzen und Berichte Forschungssammlungen
International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Druckformat: 2152-5102
ISSN Online: 2152-5110

Volumen 47, 2020 Volumen 46, 2019 Volumen 45, 2018 Volumen 44, 2017 Volumen 43, 2016 Volumen 42, 2015 Volumen 41, 2014 Volumen 40, 2013 Volumen 39, 2012 Volumen 38, 2011 Volumen 37, 2010 Volumen 36, 2009 Volumen 35, 2008 Volumen 34, 2007 Volumen 33, 2006 Volumen 32, 2005 Volumen 31, 2004 Volumen 30, 2003 Volumen 29, 2002 Volumen 28, 2001 Volumen 27, 2000 Volumen 26, 1999 Volumen 25, 1998 Volumen 24, 1997 Volumen 23, 1996 Volumen 22, 1995

International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v35.i6.60
pages 581-593

Combined Effect of Short Roughness Strip and Concentrated Wall Suction on Coherent Structure in a Turbulent Boundary Layer

M. O. Oyewola
Department of Mechanical Engineering University of Ibadan Ibadan, Nigeria
A. A. Adesina
School of Chemical Engineering and Industrial Chemistry, University of New South Wales,


Hot-wire measurements have been undertaken in a turbulent boundary layer in order to examine the combined effect of short roughness strip and localized wall suction on near-wall coherent structures. The short roughness strip is placed immediately after the suction strip and the suction is applied through a short porous strip for a range of suction rates. The results of Reynolds stresses indicate that the pseudo-equilibrium of the organized motion of the layer have been altered due to the suppression of the near-wall coherent structures. This is evident in the attenuation of the spectra and co-spectra relative to the undisturbed layer. Although, short roughness strip altered the magnitude and wavelength of the effect of suction on the layer, the results suggest that the short roughness strip and suction act independently on the mechanism of the layer.