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Assessment of large-scale motion in turbulent boundary layer subjected to a short roughness strip

Measurements have been made in a turbulent boundary layer which is subjected to a short roughness strip, with the view to examine the influence of short roughness strip on the large scale motion. This is quantified through the analysis of autocorrelation of the fluctuating velocities in the streamw...

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Format: Article
Published: 2011
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MARC

LEADER 00000njm a2000000a 4500
001 oai:repository.ui.edu.ng:123456789/1843
042 |a dc 
720 |a Oyewola, M. O  |e author 
720 |a Ismail, O. S.  |e author 
720 |a Adaramola, M. S.  |e author 
260 |c 2011 
520 |a Measurements have been made in a turbulent boundary layer which is subjected to a short roughness strip, with the view to examine the influence of short roughness strip on the large scale motion. This is quantified through the analysis of autocorrelation of the fluctuating velocities in the streamwise and wall-normal downstream of a roughness strip. Also, distributions of cross correlation functions are presented. The results indicate that, reference to the smooth wall, there are noticeable changes in the distributions of autocorrelation and cross correlation functions, suggesting that the large scale motion is altered as a result of the modification of the structure near the wall in the presence of the roughness element. This change extends to significant portion of the boundary layer. 
024 8 |a 1064-2277 
024 8 |a International Journal of Fluid Mechanics Research 
024 8 |a ui_art_oyewola_assessment_2011 
024 8 |a http://ir.library.ui.edu.ng/handle/123456789/1843 
245 0 0 |a Assessment of large-scale motion in turbulent boundary layer subjected to a short roughness strip