Refining Pink Beam Fast Microtomography to Study Time Resolved Multi-Phase Flow in 3D Porous Media (173)
Pink beam fast x-ray microtomography was optimized for two-phase flow experiments. The most ideal configuration utilizes a 1 mm copper filter and 1.5 mrad platinum mirror to filter out the low and high energy x-rays, respectively. This configuration, along with minimizing x-ray exposure when not scanning, limits bubble formation in the wetting phase while providing adequate image quality. A case study looking at the production of interfacial area in a transient and quasi-static two-phase flow experiment shows that transient flow produces more interfacial area.