University of Illinois Urbana-Champaign

Study of turbulent flow in rough pipes

Robertson, J.M.; Burkhart, T.H.; Martin, J.D.

Permalink

https://hdl.handle.net/2142/112000

Description

Title
Study of turbulent flow in rough pipes
Author(s)
  • Robertson, J.M.
  • Burkhart, T.H.
  • Martin, J.D.
Issue Date
1965-05
Keyword(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.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
  • TAM R 279
  • 1966-0083
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/112000
Sponsor(s)/Grant Number(s)
Bureau of Ships Fundamental Hydromechanics Research Program, S-R009 01 01, David Taylor Model Basin, Contract Nonr-1834 (32)
Copyright and License Information
Copyright 1965 Board of Trustees of the University of Illinois

Owning Collections

Technical Reports - Theoretical and Applied Mechanics (TAM) PRIMARY
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.