Jean Léonard Marie Poiseuille
Jean Léonard Marie Poiseuille was a French physicist and physiologist.
Poiseuille was born in Paris, France, and he died there on 26 December 1869.Fluid flow
From 1815 to 1816 he studied at the École Polytechnique in Paris. He was trained in physics and mathematics. In 1828 he earned his D.Sc. degree with a dissertation entitled Recherches sur la force du coeur aortique. He was interested in the flow of human blood in narrow tubes.
In 1838 he experimentally derived, and in 1840 and 1846 formulated and published, Poiseuille's law, which applies to laminar flow, that is, non-turbulent flow of liquids through pipes of uniform section, such as blood flow in capillaries and veins.
The equation in standard fluid dynamics notation is
or
or
where:
The poise, the unit of viscosity in the CGS system, was named after him. Attempts to introduce "poiseuille" as the name of the SI unit Pa·s had little success.
