The outflow of hydrogel spheres from a cylindrical storage container with narrow outlet of two different sizes is imaged by means of ultrafast X-ray computed tomography (UFXCT) at different heights above the outlet. Sequences of cross-sectional images were recorded over 30 s with a frame rate of 1000 fps in dual plane mode.
hydrogel spheres diameter: 6 mm, diameter of cylindrical container: 90 mm, outlet diameter: 19 mm and 24 mm, filling height: 80 cm, measurement heights: 10 mm, 30 mm, 50 mm, 90 mm and 200 mm above outlet
{"references": ["Stannarius et al., High-speed X-ray tomography of silo discharge, submitted to New Journal of Physics"]}