Evaluation of correlations for minimum fluidization velocity (Umf) in gas-solid fluidization

Remf = (K12 + K2Ar)0.5 − K1 type of correlations: semi-log plot of Umf vs. dp for Geldart Groups (a) A and (b) B particles. For Group A, dp = 30-170 μm, ρp = 1450 kg/m3, φ = 0.58, and εmf = 0.42. For Group B, dp = 80-640 μm, ρp = 2650 kg/m3, φ = 0.85, and εmf = 0.42. For both cases, ρ = 1.2 kg/m3, μ = 0.000018 Pa·s, P = 101.325 kPa, T = 298 K.136