While coffee rings have been written about since 1997 or so, there's still much to be discovered. Here's a neat video on @YunkerLab's research showing that the coffee ring effect doesn't happen if the particles are elongated like ellipsoids! https://www.youtube.com/watch?v=ZaCGoSTMHyc … 2/4
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At the end of that clip, there's a shot of the clumping of particles at the droplet edge. Here's the sequel video (no groovy soundtrack, sadly) which illustrates three simple random growth models for that intriguing process (none are DLA!) https://www.youtube.com/watch?v=8KhEQN-uEZs … 3/4
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It was fun to be reminded about this, so I made an
@observablehq notebook where you can play with these models in your browser: https://beta.observablehq.com/@bryangingechen/poisson-kpz-and-quenched-kpz … (Full disclosure, though I wasn't involved with any of this work, I was in grad school with Peter when he did most of this!) 4/4Show this thread
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