Powder Material: Terminal Velocity

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Powder Material Terminal Velocity

• Physical Properties of Bio-Materials (V-B)

Poching Wu, Ph.D. Department of Bio-Mechatronic
Engineering National Ilan University
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(No Transcript)
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Stokes Law (G. G. Stokes)
where d diameter V velocity of
particle ?p density of particle ?l density
of fluid g acceleration of gravity a
acceleration of particle CD drag coefficient
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when a 0 or dV/dt 0
Drag Coefficient, CD
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Average drag coefficient for cross flow over a
smooth circular cylinder and a smooth sphere.
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Stokes (NR lt 1)
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Allen (1 lt NR lt 500)
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Newton (500 lt NR lt 2105)
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Diameter of Water Droplet vs. Terminal Velocity