Kim, F.; Penumadu, D.; Kardjilov, N.; Manke, I.: High Resolution Neutron Imaging of Multi-phase Fluid Flow through Compacted Porous Media. In: Veerle Cnudde ... [Ed.] : Tomography of Materials and Structures : Book of abstracts, Talks ; 1st International Conference on Tomography of Materials and Structures; ICTMS 2013, July 1-5 (Ghent, Belgium). Ghent, 2013. - ISBN 9789461971302, p. 51-54
http://www.ictms.ugent.be/downloads/talks_def_def.pdf

Abstract:
In-situ imaging of water flow through compacted silica sand is performed with neutron radiography and tomography at cold neutron imaging beam line (CONRAD) of Helmholtz-Zentrum-Berlin (HZB), Germany. Initial microstructure of the compacted sand in dry state is obtained by using a micro-focus X-ray tomography system due to good contrast of silica and void phases. The flow of water is precisely controlled by using a syringe pump. Water is allowed to flow from bottom to top at a target flow rate. Time-lapsed neutron radiographies are obtained during the water injection stage, followed by neutron tomography to evaluate the distribution of water, air, and silica phase in 3-D after injecting known amount of water under controlled conditions. This study has broad implications to a wide array of problems involving the use of tomography to study transport through porous materials.