Scientists crack 'the Brazil-nut' puzzle, how do the largest nuts rise to the top?

Scientists have for the first time captured the complex dynamics of particle movement in granular materials, helping to explain why mixed nuts often see the larger Brazil nuts gather at the top. The findings could have vital impact on industries struggling with the phenomenon, such as pharmaceuticals and mining.

from Latest Science News -- ScienceDaily https://www.sciencedaily.com/releases/2021/04/210419084302.htm