Calculation of Variable Property Turbulent Friction and Heat Transfer in Rough Pipes

[+] Author and Article Information
A. T. Wassel

Science Applications, Inc., El Segundo, CA

A. F. Mills

Department of Chemical, Nuclear and Thermal Engineering, University of California, Los Angeles, CA 90024

J. Heat Transfer 101(3), 469-474 (Aug 01, 1979) (6 pages) doi:10.1115/1.3451011 History: Received May 22, 1978; Online August 11, 2010


A numerical calculation method for turbulent flow in rough pipes is developed. A mixing length model is used in the turbulent core while a roughness element drag coefficient and a sub-layer Stanton number are used to characterize transport to the wall. Sample wall relations are developed for sandgrain roughness and transverse repeated rib roughness, and it is shown that large roughness heights require accounting for terms of order of roughness height divided by pipe radius. For gas flows with cooling, the effects of variable properties are investigated for smooth walls and both roughness patterns. For smooth walls, comparison with experiment is satisfactory; for rough walls experimental data is not available. Simple power law formulae representing variable property effects for fully rough flows are presented.

Copyright © 1979 by ASME
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In