Show that, when Re_p > 1000 and C_D is governed by Eq. (3.2-5), the range of feasible velocities for fluidizing spheres of diameter d and density ρo is

Given that ε_f ≅ 0.41 under these conditions (Kunii and Levenspiel, 1977, p. 73), v_f/v_m = 0.11. That is, there is approximately a 10-fold range of feasible velocities at high Re_p, in contrast to the 100-fold range at low Re_p.

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1/2 1/2 Pop [E/ (~^~^)]" << [1(²7) M]". Po P gd 1.75 Us gd p (P3.11-1)