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Characterisation of sandpaper roughness under a turbulent incompressible boundary layer

Published online by Cambridge University Press:  04 July 2016

J. C. Gibbings  and
S. M. Al-Shukri
J. C. Gibbings
Affiliation:
Department of Mechanical EngineeringUniversity of Liverpool, UK
S. M. Al-Shukri
Affiliation:
Department of Mechanical EngineeringUniversity of Liverpool, UK
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Abstract

The work reported here extends the work of Nikuradse on the categorisation of surface roughness. Nikuradse’s work considered pipe flow, whilst in this paper boundary layer flow is investigated. Important and fundamental differences between these two types of flow are shown. An experiment upon turbulent boundary layers over sandpaper-type roughnesses enabled a fluid-mechanic categorisation of these surfaces to be obtained for this flow. This is compared with some shape and size categorisations of the roughnesses from detailed measurements.

Type
Research Article
Information
The Aeronautical Journal , Volume 100 , Issue 996 , July 1996 , pp. 235 - 239
Copyright
Copyright © Royal Aeronautical Society 1996 

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