Diffussion-limited aggregation and the mobility of particles

[Sciencestd]

How a high mobility of particles over surface cause to aggregation, the professor in the class said that "high mobility causes to local equilibration and thus to a compact aggregation".. which I didn't understand..! What does he mean about local equilibration and how all connect to each other?!

 

[JLT]

Looks like an old thread, but if you are still out there - think of cars piling up in a traffic jam, or sticks flowing down a river. As soon as two particles bump into one another, they lose energy - so then those two particles slow down, and others catch up, and traffic jam! On highways, it is a natural phenomenon, not always bad driving that causes "aggregation". Cars slow down to try and keep safe separation, and it just takes one car slowing down before everyone is piled up. It all stems from energy dissipation through interactions.

 

[Sciencestd]

I still here :) thank you so much for answering the thread :)