Darcy Law

Henry Darcy (1803 to 1858) invented the modern style Pitot tube, was the first researcher to suspect the existence of the boundary layer in fluid flow, contributed in the development of the Darcy-Weisbach equation for pipe flow resistance, made major contributions to open channel flow research and of course developed Darcy's Law for flow in porous media. His Law is a foundation stone for several fields of study including ground-water hydrology, soil physics, and petroleum engineering.