death_date death_place birth_place nationality field birth_date known_for image article_title name alma_mater
26 december 1869 paris paris french physicist and physiologist 22 april 1797 poiseuille 's law poiseuille.jpg jean léonard marie poiseuille
 jean léonard marie poiseuille École polytechnique
jean léonard marie poiseuille

jean léonard marie poiseuille -lrb- ; 22 april 1797 -- 26 december 1869 -rrb- was a french physicist and physiologist .
poiseuille was born in paris , france , and he died there on 26 december 1869 .
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 -lrb- now commonly known as the hagen -- poiseuille equation , crediting gotthilf hagen as well -rrb- , which applies to non-turbulent flow of liquids through pipes , such as blood flow in capillaries and veins .
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 .
