Measurements of the collision properties of small spheres by S. F. Foerster and others 2026-11-05
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Physics of Fluids 6(3), 1108–1115. Verified byline: S. F. Foerster, M. Y. Louge, H. Chang and K. Allia. The excerpt's abstract describes free-fall release without initial spin and stroboscopic trajectory measurements; its Table 1 reports normal restitution and frictional and tangential restitution properties for glass and acetate spheres. The collision researcher H. Chang is kept distinct from the helium-correlation author of the same initials.
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