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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 41: Focus Session: Wetting on Adaptive Substrates II (joint session CPP/DY/O)
CPP 41.1: Invited Talk
Thursday, March 21, 2024, 11:30–12:00, H 0107
A multi-scale approach to characterize wetting within a porous medium — •Maja Rücker1, Ryan T. Armstrong2, Chenhao Sun3, Peyman Mostaghimi2, Steffen Berg4,5, Paul Luckham5, Apostolos Georgiadis4,5, and James E. McClure6 — 1Eindhoven University of Technology, Eindhoven, NL — 2University of New South Wales, Sydney, Australia — 3China University of Petroleum, Beijing, China — 4Shell Global Solutions International B.V., Amsterdam, NL — 5Imperial College London, London, UK — 6Virginia Tech, Arlington, VA, USA
Considering a porous medium with two fluids in it, the fluid flow and distribution will depend on the wetting characteristic of the system. Recent developments in imaging techniques, such as micro-computed tomography and atomic force microscopy, alongside advances in computational modelling allowed for new concepts linking macroscopic wetting responses to the fundamental microscopic wetting definitions to emerge. We present an approach to upscale wetting parameters building upon energetic and geometric considerations and accounting for the various mechanisms related to wetting, manifesting at those different length scales. Starting from fluid-solid interactions, through the motion of three-phase contact lines to the evolution of fluid configurations in the porous medium, we show experimental observation on a coherent set of fluid/fluid/solid systems and discuss those in relation to the proposed upscaling concept. We will highlight the remaining questions for the characterization of wetting in the context of multiphase flow in porous media and point out future research directions.
Keywords: wetting; porous media; multiphase flow