Table 1 Physical characteristics of grain samples

From: Wormhole formation in fluid-driven granular flow

Sieve range (μm)

d (μm)

θr (°)

\({\theta }_{\max }^{* }\)(°)

ϕs

53–75

64.5

32.5 ± 0.1

75.5 ± 1.1

0.553

75–100

87.3

33.2 ± 0.9

78.9 ± 0.3

0.573

100–125

122.8

35.9 ± 0.2

81.0 ± 0.7

0.559

125–150

142.7

40.6 ± 1.4

83.6 ± 0.5

0.546

  1. Granular materials were sieved within various size ranges and their properties quantified: average grain diameter d, in situ static angle of repose θr, maximum dynamic angle of repose \({\theta }_{\max }^{* }\) and static solid fraction ϕs measured in the silo.
Back to article page