Influence of shape on the fall velocity of sedimentary particles
Techniques used in modern sediment engineering require knowledge of the fall velocity of sediment particles in water. Under certain conditions the fall velocity of a sphere can be computed using Stokes Law. Stokes Law, however, considers only the viscous forces on the particle. The resistance of particles falling in water is attributed to (1) viscous deformation of the fluid, and (2) inertial losses in the fluid caused by acceleration (both tangential and normal acceleration) of the fluid around the particle. The Reynolds number (a ratio of the inertial forces to the viscous forces) is a ...
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