Derive an equation relating the settling velocity of sand particles to particle diameter with the following assumptions: specific gravity (S.G.) of sand = 2.65, shape factor (𝜙) = 0.90, and temperature of 20∘C (𝜇 = 1.002 × 10−3 kg/(m⋅s) and ρ = 998.2 kg/m3). Assume that CD = 18.5/(NR) 0.6 for Reynolds number = 1.9 to 500 (Rich, 1971, p. 86).
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