Particle Size (d_v) in μm

Archimedes Number (A_r)⁺

Minimum Velocity (U_mf*)

10

0.0516

0.05

20

0.4130

0.10

30

1.3937

0.23

40

3.3037

0.51

50

6.4500

0.95

60

11.1456

1.62

70

17.6988

2.56

80

26.4192

3.80

90

37.6164

5.39

100

51.6000

7.38