##  [Poiseuille's Law](/poiseuilles-law) 

  ##  [Poiseuille's Law](https://health.quantumdictionary.io/poiseuilles-law-0) 

  

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**Health & Life Sciences Dictionary**

 







 

 

 

 



 

 

 

 

Definition

An analytical expression for laminar, incompressible, Newtonian flow through a straight, rigid cylindrical conduit stating volumetric flow rate Q = (π r^4 ΔP)/(8 μ L), where r is radius, ΔP the pressure drop, μ the fluid viscosity and L the conduit length. It assumes fully developed laminar flow, no slip at walls, and rigid circular geometry.