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Ellipsoidal Particles
For particles that are ellipsoids of revolution, the drag force is given by
where a is the equatorial semi-axis of the ellipsoids and K′ is a shape factor.
For the motion of a prolate ellipsoid along the polar axis as shown in Figure 6a,
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(18) |
where β is the ratio of the major axis b to the minor axis a.
For the motion of a prolate ellipsoid of revolution transverse
to the polar axis, as shown in Figure 6b
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(19) |
Similarly, for the motion of an oblate ellipsoid of revolution
along the polar axis as shown in Figure 7a,
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(20) |
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| Calculation Models - Ellipsoids of Revolution |
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Oblate Ellipsoid - Shape Factor
Prolate Ellipsoid - Shape Factor
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