Poiseuille's law

Poiseuille's law
Poi·seuille's law pwä-'zə(r)z-, -'zwēz-, -'zə-ēz- n a statement in physics: the velocity of the steady flow of a fluid through a narrow tube (as a blood vessel or a catheter) varies directly as the pressure and the fourth power of the radius of the tube and inversely as the length of the tube and the coefficient of viscosity
Poi·seuille pwȧ-zœy Jean-Léonard-Marie (1797-1869)
French physiologist and physician. Poiseuille is best known for his research on the physiology of the circulation of blood through the arteries. He published his research in an 1828 dissertation in which he demonstrated that blood pressure rises and falls on expiration and inspiration. His interest in blood circulation led him to study the flow rates of other fluids. In 1840 he formulated the law regarding the flow rate for the laminar flow of fluids in circular tubes. In 1847 he published the results of further experiments using ether and mercury. Gotthilf Hagen, a German hydraulic engineer, discovered Poiseuille's law independently in 1839.

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an equation describing the volume flow rate (F) of a liquid through a capillary tube:

where P is the pressure drop along the tube, R is the radius and L the length of the tube, and η is the viscosity of the fluid.


Medical dictionary. 2011.

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  • Poiseuille’s law — Puazeilio dėsnis statusas T sritis fizika atitikmenys: angl. Poiseuille’s law vok. Poiseuillesches Gesetz, n rus. закон Пуазейля, m pranc. loi de Poiseuille, f …   Fizikos terminų žodynas

  • poiseuille's law — (ˈ)pwä|zə(r)z , zə̄z noun Usage: usually capitalized P Etymology: after Jean L. M. Poiseuille died 1869 French physician : a statement in physics: the velocity of flow of a liquid through a capillary tube varies directly as the pressure and the… …   Useful english dictionary

  • Poiseuille's law — /pwah zweez /, Physics, Mech. the law that the velocity of a liquid flowing through a capillary is directly proportional to the pressure of the liquid and the fourth power of the radius of the capillary and is inversely proportional to the… …   Universalium

  • Poiseuille's law space — Poi·seuille s law, space (pwah swēzґ) [J.L.M. Poiseuille] see under law and space …   Medical dictionary

  • Poiseuille, Jean-Louis-Marie — ▪ French physician born April 22, 1799, Paris, France died Dec. 26, 1869, Paris       French physician and physiologist who formulated a mathematical expression for the flow rate for the laminar (nonturbulent) flow of fluids in circular tubes.… …   Universalium

  • law — 1. A principle or rule. 2. A statement of fact detailing a sequence or relation of phenomena that is invariable under given conditions. SEE ALSO: principle, rule, theorem. [A.S. lagu] Alexander l. states that a jerky nystagmus becomes worse when… …   Medical dictionary

  • Poiseuille — Jean Léonard Marie, French physiologist and physicist, 1799–1869. See poise, P. viscosity coefficient, P. law, P. space …   Medical dictionary

  • Poiseuille equation — see under law …   Medical dictionary

  • Hagen-Poiseuille equation — The Hagen Poiseuille equation is a physical law that describes slow viscous incompressible flow through a constant circular cross section. It is also known as the Hagen Poiseuille law, Poiseuille law and Poiseuille equation.Equationtandard fluid… …   Wikipedia

  • Jean Louis Marie Poiseuille — Infobox Scientist name = Jean Louis Marie Poiseuille birth date = April 22, 1799 birth place = Paris death date = December 26, 1869 death place = Paris residence = citizenship = nationality = French ethnicity = field = physician and physiologist… …   Wikipedia

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