Fig. 1
From: Laboratory experiments on agglomeration of particles in a granular stream
Particle size distributions. Cumulative volume fractions plotted against the particle diameter. a 50 μm glass beads, b 100 μm glass beads, c alumina particles, and d silica sand. Solid and dashed lines are the size distributions determined using a laser diffractometer and optical microscope images, respectively. In the latter, the diameter of the equivalent sphere of the projected area of the microscope image is used