##  [Multi-Scale Coupling](/multi-scale-coupling) 

  ##  [Multi-Scale Coupling](https://engineering.quantumdictionary.io/multi-scale-coupling-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 & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

The modelling practice of linking representations of a system at two or more distinct spatial or temporal scales so that fine‑scale processes inform coarse‑scale behaviour (upscaling) and coarse‑scale fields supply boundary or loading conditions to fine‑scale models (downscaling), enabling emergent phenomena that span scales to be represented.