Particle Size (d_v) in μm

Archimedes Number (A_r)⁺

Minimum Velocity (U_mf*)

10

0.0308

0.05

20

0.2464

0.10

30

0.8314

0.21

40

1.9712

0.44

50

3.8500

0.81

60

6.6528

1.37

70

10.5644

2.14

80

15.7696

3.17

90

22.4532

4.49

100

30.8000

6.14