Discussion of “Gene expression programming analysis of implicit Colebrook–White equation in turbulent flow friction factor calculation” by Saeed Samadianfard [J. Pet. Sci. Eng. 92-93 (2012), 48-55]
Maximal relative error of the explicit approximation to the Colebrook equation for flow friction presented in the discussed paper by Saeed Samadianfard [J. Pet. Sci. Eng. 92-93 (2012), 48-55; doi. 10.1016/j.petrol.2012.06.005] is investigated. Samadianfard claims that his approximation is very accurate with the maximal relative error of no more than 0.08152%. Here is shown that this error is about 7%. Related comments about the paper are also enclosed.
BRKIC Dejan;
2014-12-16
ELSEVIER SCIENCE BV
JRC90647
0920-4105,
http://www.sciencedirect.com/science/article/pii/S0920410514001624,
https://publications.jrc.ec.europa.eu/repository/handle/JRC90647,
10.1016/j.petrol.2014.06.007,
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