April 22nd
- French physician and physiologist who contributed to knowledge of blood circulation through arteries and experimentally derived an equation describing the laminar flow rate of fluids through narrow tubes
- Now known as the Hagen- Poiseuille equation because the German engineer Gotthilf Hagen also independently discovered it.
- It relates the flow rate to the fluid’s viscosity, the pressure drop along the tube, and the radius of the tube.
