The drag on a sphere moving in a fluid is known to be a functionof the sphere diameter
Chapter 7, Problem 7.66(choose chapter or problem)
The drag on a sphere moving in a fluid is known to be a functionof the sphere diameter, the velocity, and the fluid viscosity anddensity. Laboratory tests on a 4-in.-diameter sphere were performedin a water tunnel and some model data are plotted in Fig. P7.66.For these tests the viscosity of the water was 2.3 105 lb s/ft2and the water density was 1.94 slugs/ft3. Estimate the drag on an8-ft-diameter balloon moving in air at a velocity of 3 ft/s. Assumethe air to have a viscosity of 3.7 107 lb s/ft2 and a density of2.38 103 slugs/ft3.
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