Here is a longer paper in PDF
on the Darcy-Weisbach Equation. Its abstract appears below.
The History of the
Darcy-Weisbach Equation for Pipe Flow Resistance
Glenn O. Brown
Proceedings of the 150th Anniversary Conference of ASCE
Washington, D.C., November, 3-6, 2002, A. Fredrich, and J. Rogers
American Society of Civil Engineers, Reston, VA.
The historical development of the Darcy-Weisbach equation for
pipe flow resistance is examined. A concise examination of the
evolution of the equation itself and the Darcy friction factor
is presented from their inception to the present day. The contributions
of Chézy, Weisbach, Darcy, Poiseuille, Hagen, Prandtl,
Blasius, von Kármán, Nikuradse, Colebrook, White,
Rouse and Moody are described.
Finally, here is the PowerPoint
presentation that goes with the paper.