The moody friction factor f is used in the darcyweisbach major loss equation. Request pdf on jul 9, 2014, saturninoluis albert virto and others published presentacion 10. In 1944, lewis ferry moody plotted the darcyweisbach friction factor against reynolds number re for various values of relative roughness. It was first published in 1900 by john moody, nine years before he founded moody s. A concise examination of the evolution of the equation itself and the darcy friction factor is. Another hydraulics program, for calculating pipes with moody s diagram. Initially called moody s manual of industrial and miscellaneous securities, it was later superseded by moody s manual of railroads and corporation securities, then by moody s analyses of investments. If you continue browsing the site, you agree to the use of cookies on this website. This chart became commonly known as the moody chart or moody diagram. Moody s manual is a series of manuals published by the moody s corporation. A moody diagram that can be used to estimate friction coefficients. Equations can be found in discussion and references for closed conduit flow.
Darcy friction factor for re between 10 and 10e8 for values of relative roughness. Pdf the history of the darcyweisbach equation for pipe. However, you must still enter an e for the program to run even though e is not used to compute f. It adapts the work of hunter rouse but uses the more practical choice of coordinates employed by r. Profesor pedro vargas diametro ext mm espesor mm diametro interior mm diametro ext mm espesor mm diametro interior mm 14 355,6 6,35 342,9 1 12 48,3 5,08 38,1 16 406,4 6,35 393,7 2 60,3 5,54 49,2. The historical development of the darcyweisbach equation for pipe flow resistance is examined.
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