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D. All Flow Regimes

The foregoing expressions give the suspension velocity (Vs) relative to the single particle free settling velocity, V0, i.e., the Stokes velocity. However, it is not necessary that the particle settling conditions correspond to the Stokes regime to use these equations. As shown in Chapter 11, the Dallavalle equation can be used to calculate the single particle terminal velocity V0

under any flow conditions from a known value of the Archimedes number, as follows:

where

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