##  [Principle of Dynamic Similarity](/principle-dynamic-similarity) 

  ##  [Principle of Dynamic Similarity](https://engineering.quantumdictionary.io/principle-dynamic-similarity-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

Two flow systems are dynamically similar when they are geometrically similar and all relevant nondimensional parameters (e.g., Reynolds, Froude, Mach, Strouhal, Weber numbers as appropriate to the physical phenomena) have identical values; under dynamic similarity, the governing nondimensional equations coincide and model‑scale measurements can be scaled to predict full‑scale behavior for the matc