[ELI5]How does a washing machine agitator create such good circulation when it just shakes back in forth?

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If I drop a sock into the washing machine after the canister is filled, it quickly gets drawn towards the center and sucked underwater. The agitator just has some small vertical fins on it that shake back and forth. The non-fluid-dynamics part of brain thinks the water would just go back and forth but there seems to be some vertical currents going on. What gives?

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Anonymous 0 Comments

Entropy. A closed system will move towards chaos.get a pitcher of water and put in 50 red balls and 50 blue balls. Each at opposite sides. Shake it just a little at a time. Eventually all the little interactions will cause the balls to mix.

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