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Mathematics 2019, 7(3), 253; https://doi.org/10.3390/math7030253

Discussion of “Accurate and Efficient Explicit Approximations of the Colebrook Flow Friction Equation Based on the Wright ω-Function” by DejanBrkić; and Pavel Praks, Mathematics 2019, 7, 34; doi:10.3390/math7010034

1
Laboratory of Water and Environmental Sciences, Messadia Med Cherif University, Souk Ahras 41000, Algeria
2
Research Laboratory in Subterranean and Surface Hydraulics (LARHYSS), University of Biskra, PO Box 145, Biskra 07000, Algeria
3
Department of Civil Engineering, Faculty of Science and Engineering, University of Laval, Quebec, QC G1V 0A6, Canada
*
Author to whom correspondence should be addressed.
Received: 30 January 2019 / Revised: 7 March 2019 / Accepted: 10 March 2019 / Published: 12 March 2019
(This article belongs to the Section Engineering Mathematics)
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Abstract

The Colebrook-White equation is often used for calculation of the friction factor in turbulent regimes; it has succeeded in attracting a great deal of attention from researchers. The Colebrook–White equation is a complex equation where the computation of the friction factor is not direct, and there is a need for trial-error methods or graphical solutions; on the other hand, several researchers have attempted to alter the Colebrook-White equation by explicit formulas with the hope of achieving zero-percent (0%) maximum deviation, among them Dejan Brkić and Pavel Praks. The goal of this paper is to discuss the results proposed by the authors in their paper:” Accurate and Efficient Explicit Approximations of the Colebrook Flow Friction Equation Based on the Wright ω-Function” and to propose more accurate formulas. View Full-Text
Keywords: friction factor; explicit solutions; moody diagram; maximum deviation; turbulent flow friction factor; explicit solutions; moody diagram; maximum deviation; turbulent flow
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Zeghadnia, L.; Achour, B.; Robert, J.L. Discussion of “Accurate and Efficient Explicit Approximations of the Colebrook Flow Friction Equation Based on the Wright ω-Function” by DejanBrkić; and Pavel Praks, Mathematics 2019, 7, 34; doi:10.3390/math7010034. Mathematics 2019, 7, 253.

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