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Unformatted text preview: veloped, and there is no pressure gradient in the direction of flow. (a) Start with the NavierStokes equations and determine the velocity distribution u ( y ) across the plates. (b) Determine the flowrate q passing between the plates (for a unit width). 4. Flow characteristics for a 30ftdiameter prototype parachute (Fig. 4) are to be determined by tests of a 1ftdiameter model parachute in a water tunnel. (a) The drag, D , can be expressed as D = f ( , V , d ), where is the fluid density, V is the parachute velocity, and d is the parachute diameter. Use the dimensional analysis and find a suitable pi parameter for this problem. (b) Some data collected with the model parachute indicate a drag of 17 lb when the water velocity is 4 ft/s. Use the model data to predict the drag on the prototype parachute falling through the air at 10 ft/s. ( water = 1.94 slugs/ft 3 and air = 2.38 103 slugs/ft 3 ) Fig. 3 Fig. 4...
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 Fall '10
 FredrickStern
 Force, Friction

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