Seminar - Imaging Flow and Deformation in Porous Media: Case Studies in Wood and Paper

Abstract:

Capturing the dynamics of deformation and fluid flow in porous media requires both specialized imaging tools and novel analysis strategies. In this talk, I will first provide an overview of the Pulp and Paper Centre’s X-ray microtomography facility and its operational capabilities. I will then present two case studies focused on cellulosic systems. The first examines the 4D deformation of wood under stepwise uniaxial compression using X-ray microtomography. The second investigates the multiscale dynamics of liquid imbibition in paper using a combination of X-ray radiography, confocal microscopy, and optical coherence tomography. Both studies demonstrate the ability of imaging techniques to reveal dynamic processes in porous materials. I will also describe segmentation and quantitative image analysis techniques developed to extract meaningful physical parameters.

Speaker Bio:

Samuel Brown is a doctoral student in the Department of Chemical and Biological Engineering at UBC, working under the supervision of Dr. Mark Martinez. His research investigates the fundamental mechanisms governing flow and deformation in porous materials, with a particular focus on cellulosic systems such as wood and paper. He develops and applies advanced imaging techniques, including X-ray microtomography, confocal microscopy, and optical coherence tomography, alongside custom image analysis pipelines to quantify complex material behaviours. Sam’s work encompasses materials science and fluid mechanics and aims to support improved experimental tools for characterizing porous media across scales.