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Title:Study of turbulent flow in rough pipes
Author(s):Robertson, J.M.; Burkhart, T.H.; Martin, J.D.
Subject(s):Turbulent Flow
Rough Pipes
Abstract:The considerable literature on turbulent flow past rough surfaces is correlated in terms of modes of presenting the smooth-to-roughness transition and the influences of roughness density and shape. Flow measurements in a 3 in. smooth and sand roughened pipe and in an 8 in. steel pipe with “natural” roughness are reported. The temporal-mean velocity and friction measurements show transitional (between smooth and fully rough behavior) variations in accord with results of Nikuradse and Colebrook and White for the sand roughened pipe and in accord with Colebrook’s natural roughness transition for the steel pipe. The pipe factor variation is also elucidated; the sand-roughened pipe studies indicate a shift in Nikuradse’s presentation. The turbulence – as intensity divided by shear velocity and macroscale in ratio to pipe radius – in rough pipe flow appears the same in rough as in smooth pipe flow. The relative turbulence intensity is constant, or at most decreases slowly with increase in flow Reynolds number. There is evidence, in need of further verification, of an increase in macroscale with flow Reynolds number.
Issue Date:1965-05
Publisher:Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report:TAM R 279
Genre:Technical Report
Sponsor:Bureau of Ships Fundamental Hydromechanics Research Program, S-R009 01 01, David Taylor Model Basin, Contract Nonr-1834 (32)
Rights Information:Copyright 1965 Board of Trustees of the University of Illinois
Date Available in IDEALS:2021-11-04

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  • Technical Reports - Theoretical and Applied Mechanics (TAM)
    TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.

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