Resumo

ANAYA-DURAND, Alejandro Isaías; CAUICH-SEGOVIA, Guillermo Israel; FUNABAZAMA-BARCENAS, Oliver  e  GRACIA-MEDRANO-BRAVO, Víctor Alfonso. Evaluation of explicit friction factor equations for pipes. Educ. quím [online]. 2014, vol.25, n.2, pp.128-134. ISSN 0187-893X.

Within Chemical Engineering, there are a lot of problems involving fluids in motion, and for their solution we must consider the causes of the movement. In this case there is a force that stops fluid from moving, called friction. The evaluation of this term comes from and extended analysis of all the forces that cause stress on a differential element of volume in the bulk of the fluid. The objective of this paper is to evaluate different mathematical models that describe in an explicit form the friction factor of a fluid in a pipe. We acomplish this by comparing the numerical values against the Colebrook-White equation and the Kármán number. Needless to say there is not a perfect model to describe this kind of phenomena. But we hope to expand the knowledge of the reader, and let him to choose the best model depending on the situation.

Palavras-chave : friction factor; Darcy friction factor; Colebrook-White equation; head losses in pipes.

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