##  [Betz's Law](/betzs-law) 

  ##  [Betz's Law](https://engineering.quantumdictionary.io/betzs-law-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

Under the idealized actuator-disk model for a wind energy extractor placed in an unbounded, incompressible, steady airstream with no external pressure work, the maximum fraction of the upstream kinetic energy that can be captured by the device is 16/27 (≈ 59.3%).