Like for example when a bullet passes through fog or on the tip of owls wings move through fog it makes that little circle. What is that? And mainly what is it called?
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It is called [turbulence](https://media.istockphoto.com/id/1125702712/photo/the-turbulence-of-the-clouds-left-by-the-plane-during.jpg?s=612×612&w=0&k=20&c=L0WWHMZIqCT3z4dC7Wy6W9iiTael3YBotrVwT8DgIFM=), and it’s basically a vortex ([small tornado](https://images.theconversation.com/files/502063/original/file-20221220-20-4bvy8f.jpeg?ixlib=rb-1.1.0&q=45&auto=format&w=754&fit=clip)) that happens. The opposite is called [laminar flow](https://en.wikipedia.org/wiki/Laminar_flow).
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