Stokes’ Law Use Stoke’s law or apply drag coefficient for a sphere in creeping flow to find terminal velocity; neglect any up or down draft air currents and take buoyance into account a)Calculate how long the smallest of the dust cloud particles will take to settle to the ground from the maximum height of the plume

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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In the 1930’s the American great plains region was subjected to a period of severe dust storms, which became known as the Dust Bowl. The National Oceanic and Atmospheric Administration report that severe dust storm clouds, such as the one shown here, can reach up to 3,000 meters in height.

Stokes’ Law

Use Stoke’s law or apply drag coefficient for a sphere in creeping flow to find terminal velocity; neglect any up or down draft air currents and take buoyance into account

a)Calculate how long the smallest of the dust cloud particles will take to settle to the ground from the maximum height of the plume

Useful Information
Property
Value
Minimum Dust Particle; Dash
0.0029mm
Dust Particle Density ; Pash
1000 kg/m3
Nominal Air Density (SL + 9km)/2; Pair
1.142 kg/m3
Nominal Air Viscosity (SL + 9km)/2; Hair
1.77.10-5 kg/m-s
Transcribed Image Text:Useful Information Property Value Minimum Dust Particle; Dash 0.0029mm Dust Particle Density ; Pash 1000 kg/m3 Nominal Air Density (SL + 9km)/2; Pair 1.142 kg/m3 Nominal Air Viscosity (SL + 9km)/2; Hair 1.77.10-5 kg/m-s
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