Flowing Beads

credit Ivan C. Christov, Princeton University
A particle separation map of colored beads mixed in a tumbler.  

After mixing beads in a tumbling drum, scientists created this map of the mixing pattern. The complex pattern created after mixing the different beads delineates coherent structures, providing insight into how grains mix.  

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Journalists wishing to reproduce this image for news stories about related research should include the following image credit: Ivan C. Christov, Princeton University.