Eddies!!?? What are they? Watch

ali p
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Report Thread starter 12 years ago
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Calling all geographers! I would be very grateful if someone could please explain to me what eddies are and how they form. They keep getting mentioned in my textbook but don't tell me what they are!
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Alpott
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In fluid dynamics, an eddy is the swirling of a fluid and the reverse current created when the fluid flows past an obstacle. The moving fluid creates a space devoid of downstream-flowing water on the downstream side of the object. Fluid behind the obstacle flows into the void creating a swirl of fluid on each edge of the obstacle, followed by a short reverse flow of fluid behind the obstacle flowing upstream, toward the back of the obstacle. This phenomenon is most visible behind large emergent rocks in swift-flowing rivers.
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ali p
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Thanks so much! Good luck with your exams!
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