Hagen-Poiseuille's Law - Hagen-Poiseuille's Law

Japanese: ハーゲン=ポアズイユの法則 - ハーゲンポアズイユのほうそく

Also known as Poiseuille's law. This law states that the volume Q of a fluid flowing through a thin circular tube (radius a, length l) per unit time is given by (Equation 1) where p ₁ and p ₂ are the pressures at both ends of the tube and η is the viscosity of the fluid. It was independently discovered by G. Hagen (1797-1884) in 1839 and J. L. Poiseuille (1799-1869) in 1840. It is also applied to viscometers.
→ Related topics Turbulence

Source : Heibonsha Encyclopedia About MyPedia Information

Japanese:

ポアズイユの法則とも。細い円管（半径a，長さl）を通して単位時間に流れる流体の体積Qは，管の両端の圧力をp₁，p₂，流体の粘性率をηとすると（式１）で与えられるという法則。1839年にハーゲンG.Hagen〔1797-1884〕，1840年にポアズイユJ.L.M.Poiseuille〔1799-1869〕が独立に発見。粘度計にも応用される。
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