Fox and McDonald's Introduction to Fluid Mechanics
Fox and McDonald's Introduction to Fluid Mechanics
9th Edition
ISBN: 9781118912652
Author: Philip J. Pritchard, John W. Mitchell
Publisher: WILEY
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Chapter 1, Problem 6P

In a pollution control experiment, minute solid particles (typical mass 1 × 10−13 slug) are dropped in air. The terminal speed of the particles is measured to be 0.2 ft/s. The drag of these particles is given by FD = kV, where V is the instantaneous particle speed. Find the value of the constant k. Find the time required to reach 99 percent of terminal speed.

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#4 1.11 For a small particle of styrofoam (1 lbm/ft) (spherical, with diameter d = 0.3 mm) falling in standard air at speed V, the drag is given by FD-3mVd, where is the air viscosity. Find the maximum speed starting from rest, and the time it takes to reach 95 percent of this speed. Plot the speed as a function of time. s) Answer: (Vmax=0.0435",t=0.0133 S
Sparky is on the university speed ice skating team. When crossing the finish line Sparky wants to show off and come across the finish line on one skate with a velocity of 35 ft/sec (V). Sparky weighs 150 lbf. Sparky’s weight is supported by a thin liquid film of water melted by the pressure of the skate blade. If the blade is 13 inches long and 0.125 inches wide estimate Sparky’s deceleration resulting from viscous shear in a water film of thickness of 0.0000575 inches (h). Neglect all end effects. Evaluate all properties at 32°F. Suggest creating a simple schematic of the problem using V, h, and the viscous shear stress (not required).
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Chapter 1 Solutions

Fox and McDonald's Introduction to Fluid Mechanics

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