Name

Diameter (mm)

Dimension d×h×δ (mm)

Specific surface area (m2/m3)

Void volumem3/m3

Heaping number (n/m3)

Heaping weight (kg/m3)

Dry packing factor ( m-1 )

Polyhedral hollow ball

25

25×25

460

0.84

85000

115

776

38

38×38

325

0.87

32000

105

494

50

50×50

236

0.90

11500

90

324

76

76×76

150

0.92

3000

70

193