 ##  [Interfacial Area Concentration](/interfacial-area-concentration) 

  ##  [Interfacial Area Concentration](https://engineering.quantumdictionary.io/interfacial-area-concentration-0) 

  

 [![Engineering & Applied Technologies Dictionary](/sites/default/files/styles/large/public/2026-01/Engineering%20%26%20Applied%20Technologies.png.webp?itok=_IKO7_-n)](/topic-specific-dictionaries/engineering-applied-technologies)



**Engineering &amp; Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

The interfacial area concentration Ai (sometimes a) defined as the total contact area between two immiscible phases divided by the system or reactor bulk volume (units m2·m−3), which determines the geometrical capacity for interphase transport processes per unit volume.