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11 Cards in this Set
- Front
- Back
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laminar flow
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occurs in low velocity movement/conditions with streamlined objects. fluid particles flow relatively undisturbed in parallel layers
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turbulent flow
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occurs when fluid molecules bounce off each other mixing in chaotic fashion. occurs at high velocitys
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form/pressure drag
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the pressure differential between the front and the back of the body
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surface drag
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caused by water flowing backwards over a body which is moving forwards
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wave drag
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the interaction between two fluids creates waves.
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factors affecting form drag
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size and shape of object, the more streamlined the less form drag experienced
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factors affecting surface drag
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velocity of flow compared to the body, surface area in contact with the fluid, roughness of object
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factors affecting wave drag
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velocity of the wave, technique eg. streamlined, open vs closed environments
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Bernoullis principle
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states that an increase in the speed of fluid occurs simultaneously with a decrease in pressure
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the Magnus effect
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explains the change in flight path of a projectile and particularly relates to a ball that is spinning. the curving effect of spin on the flight of a ball
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types of spin created by the Magnus effect
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back, top, side
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