##  [Péclet Number](/peclet-number) 

  ##  [Péclet Number](https://natural.quantumdictionary.io/peclet-number-0) 

  

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**Natural & Formal Sciences Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A dimensionless number expressing the ratio between advective (convective) transport and diffusive transport of a scalar quantity; typically Pe = U L / D where U is a characteristic velocity, L a length scale, and D a diffusivity.