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10_1425_web_Lec_27_Hydrodynamics

10_1425_web_Lec_27_Hydrodynamics - Hydrodynamics Physics...

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Hydrodynamics Physics 1425 Lecture 27 Michael Fowler, UVa
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Basic Concepts Fluid conservation Bernoulli’s Equation
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You are sitting in a rowing boat in a small pond. There are some bricks in the boat. You take the bricks and throw them into the pond. They sink to the bottom. What happens to the water level in the pond, as measured at the bank? A. It falls. B. It rises. C. It stays the same.
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Fluid Flow: Laminar and Turbulent In laminar or streamline flow, each particle of fluid follows a smooth path, the streamline. Air flow over this Corvette is laminar until the end: the air cannot curve in completely at the back, it breaks away forming a turbulent wake.
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Conservation of Fluid Suppose fluid is flowing steadily through a pipe which has a narrow section. The rate of flow , gallons per sec or cubic meters per sec, must be the same past a point in the narrow part as past a point in the wide part or fluid will be piling up somewhere!
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