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Topic: Gotthilf Heinrich Ludwig Hagen

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	Gotthilf Heinrich Ludwig Hagen - Wikipedia, the free encyclopedia
		Gotthilf Heinrich Ludwig Hagen (March 3, 1797 - February 3, 1884) was a German physicist and hydraulic engineer.
		Hagen was born in Königsberg, Kingdom of Prussia (today Kaliningrad, Russia).
		Independentlly of Jean Louis Marie Poiseuille (1797-1869) Hagen in 1839 carried out the first carefully documented friction experiments in low-speed tube laminar flow, from which the Hagen-Poiseuille law has arised.
	en.wikipedia.org /wiki/Gotthilf_Heinrich_Ludwig_Hagen (184 words)

	Fluid Mechanics - MSN Encarta
		The first carefully documented friction experiments in low-speed pipe flow were carried out independently in 1839 by the French physiologist Jean Louis Marie Poiseuille, who was interested in the characteristics of blood flow, and in 1840 by the German hydraulic engineer Gotthilf Heinrich Ludwig Hagen.
		An attempt to include the effects of viscosity in the mathematical equations was first made by the French engineer Claude Louis Marie Navier in 1827, and independently by the British mathematician Sir George Gabriel Stokes, who in 1845 perfected the basic equations for viscous incompressible fluids.
		The complexity of viscous flows, especially turbulent flows, severely restricted progress in fluid dynamics until the German engineer Ludwig Prandtl recognized in 1904 that many flows could be divided into two principal regions.
	uk.encarta.msn.com /encyclopedia_761578780_2/Fluid_Mechanics.html (1155 words)

	Gotthilf Heinrich Ludwig Hagen (Site not responding. Last check: 2007-09-21)
		Hagen was born in Königsberg Brandenburg - Prussia (today Kaliningrad Russia).
		Independentlly of Jean Louis Marie Poiseuille (1797 - 1869) Hagen in 1839 carried out the first carefully documented friction experiments in low-speed tube laminar flow from which the Hagen-Poiseuille law has arised.
		Hagen AquaClear Activated Carbon Insert (for AquaClear 150)
	www.freeglossary.com /Gotthilf_Heinrich_Ludwig_Hagen (174 words)

	History Channel Search Results
		The first carefully documented friction experiments in low-speed pipe flow were carried out independently in 1839 by the French physiologist Jean Leonard Marie Poiseuille (1799–1869), who was interested in the characteristics of blood flow, and in 1840 by the German hydraulic engineer Gotthilf Heinrich Ludwig Hagen (1797–1884).
		An attempt to include the effects of viscosity into the mathematical equations was made first in 1827 by the French engineer Claude Louis Marie Navier (1785–1836), and independently by the British mathematician Sir George Gabriel Stokes, who in 1845 perfected the basic equations for viscous incompressible fluids.
		The complexity of viscous flows, especially turbulent flows, severely restricted progress in fluid dynamics until the German engineer Ludwig Prandtl (1875–1953) recognized in 1904 that many flows could be divided into two principal regions.
	www.historychannel.com /thcsearch/thc_resourcedetail.do?encyc_id=209452 (2562 words)

	CHAPTER 20
		The theoretical developments of Viscous Flow, Laminar and Turbulent Motion
		The first carefully documented friction experiments in low-speed pipe flow were carried out independently in 1839 by the French physiologist Jean Leonard Marie Poiseuille, who was interested in the characteristics of blood flow, and in 1840 by the German hydraulic engineer Gotthilf Heinrich Ludwig Hagen.
		An attempt to include the effects of viscosity into the mathematical equations was made first in 1827 by the French engineer Claude Louis Marie Navier, and independently by the British mathematician Sir George Gabriel Stokes, who in 1845 perfected the basic equations for viscous incompressible fluids.
	x-stream.fortunecity.com /laras/63/id38.htm (3167 words)

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