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Brownian motion is not quite a random walk if you think about it, since pollen grains don’t “walk.” Since they’re jostled around by water molecules at *current* location, you’re assuming spatial homogeneity. If for instance there’s a temperature gradient, you’d get a distortion
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Is there a way to maintain stable spatial non-homogeneity in a liquid that’s not flowing, to distort how Brownian motion happens? Seems like mixing processes would kick in
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