Contact spreading is the transfer of liquid via the formation and breakage of liquid bridges that form between particles. There have been few experimental studies accurately quantifying contact spreading as a function of system properties due to the difficulty of non-intrusively imaging dense granular systems. X-ray computed micro tomography (XRCT) is used in the present work to measure the time-varying spatial distribution of liquid in a shear cell geometry. We discuss the experimental system and procedures in addition to experimental results.
