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An Alternative (Preferable) Friction Factor

[+] Author Affiliations
Richard A. Gaggioli

Marquette University

Paper No. IMECE2006-13126, pp. 239-242; 4 pages
  • ASME 2006 International Mechanical Engineering Congress and Exposition
  • Fluids Engineering
  • Chicago, Illinois, USA, November 5 – 10, 2006
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-4770-5 | eISBN: 0-7918-3790-4
  • Copyright © 2006 by ASME


An alternative to the traditional friction factor for pipe flow is presented (φ = [R]f). For incompressible flows, the correlation of this new friction factor with Reynolds Number [R] and Relative Roughness [ε] is presented graphically, and appears much simpler and more intuitive than the Moody Diagram (or other equivalents). Moreover, relatively simple curve-fit formulas for representing φ explicitly as a function of R and ε are presented for various flow regimes, along with measures of error associated with these approximate formulas.

Copyright © 2006 by ASME
Topics: Friction



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