Poiseuille, Jean Louis Marie

Poiseuille, Jean Louis Marie (1799-1869) was the French physician after whom we name the Poise. 

Poise p6iz [F, fr. Jean Louis Marie Poiseuille t 1869 French physician and anatomist] (1913) n. A fundamental and absolute unit of viscosity measurement. A substance is said to have a viscosity of 1 poise when a force of 1 dyne is required to move a surface of 1 cm at a speed of 1 cm/s relative to another plane surface separated from it by a layer 1 cm thick. 

Jean Louis Marie Poiseuille (1799-1869), a French physician and physiologist, investigated the flow of human blood in narrow tubes. In 1828 he earned his doctoral degree with a dissertation entitled Recherches sur la force du coeur aortique. In the 1840s, he formulated Poiseuille s law, today named the Hagen-Poiseuille law in order to honor also Cotthilf... 

More properly called the Hagen-Poiseuille law, it was developed independently by Gotthilf Heinrich Ludwig Hagen (1797-1884) and Jean Louis Marie Poiseuille. Poiseuille s law was experimentally derived in 1838 and formulated and published in 1840 and 1846 by Jean Louis Marie Poiseuille (1797-1869). Hagen also carried out experiments in 1839. While there are a number of derivations, we follow a simple one here from Physical Chemistry by Castellan [5]. 

Poiseuiiie s equation A relationship used to determine the rate of flow of a fluid with laminar flow through a horizontal cylindrical tube or pipe. Named after French physician and physiologist Jean Louis Marie Poiseuille( 1797-1869), it is given by... 

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