Ruslan Khasanov’s “Space Iris” explores the similarities between nebulae and eyes. Made entirely with common fluids like paint, soap, and alcohol, the film shows off the gorgeous possibilities of surface-tension- and density-driven instabilities. Marangoni flows abound! I even see some hints of solutal convection, perhaps? (Video and image credit: R. Khasanov; via Colossal)
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