##  [Kinematic Viscosity](/kinematic-viscosity) 

  ##  [Kinematic Viscosity](https://engineering.quantumdictionary.io/kinematic-viscosity-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

The ratio of a fluid's dynamic viscosity μ to its mass density ρ, ν = μ/ρ, with SI units m2·s−1; it quantifies momentum diffusivity and the rate at which velocity gradients spread through a continuum fluid under the assumptions of Newtonian behaviour and the continuum hypothesis.