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Jean Léonard Marie Poiseuille

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Nationality
  
Alma mater
  
Ecole Polytechnique


Known for
  
Poiseuille\'s law

Name
  
Jean Marie

Jean Leonard Marie Poiseuille

Born
  
22 April 1797Paris (
1797-04-22
)

Died
  
26 December 1869(1869-12-26) (aged 72)Paris

Fields
  
physicist and physiologist

Jean Léonard Marie Poiseuille | Wikipedia audio article


Jean Léonard Marie Poiseuille ([pwazœj]; 22 April 1797 – 26 December 1869) was a French physicist and physiologist.

Contents

Jean Léonard Marie Poiseuille How old is Jean Lonard Marie Poiseuille Age Birthday Facts

Poiseuille was born in Paris, France, and he died there on 26 December 1869.

Fluid flow

Jean Léonard Marie Poiseuille httpsuploadwikimediaorgwikipediacommonsthu

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 (now commonly known as the Hagen–Poiseuille equation, crediting Gotthilf Hagen as well), 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 is

In standard fluid dynamics notation:

Δ P = 8 μ L Q π r 4

or

Δ P = 128 μ L Q π d 4

or

Δ P = 32 μ L v   d 2

where:

Δ P is the pressure loss L is the length of pipe μ is the dynamic viscosity Q is the volumetric flow rate r is the radius d is the diameter π is the mathematical constant Pi v is the velocity

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.

References

Jean Léonard Marie Poiseuille Wikipedia


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