Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 33: Poster Session III
CPP 33.2: Poster
Dienstag, 13. März 2018, 14:00–16:00, Poster C
Evolution of invading fluid interfaces at different wetting conditions and pore geometry — •Li weiwei1,2, Martin Brinkmann1, Hagen Scholl1,2, and Ralf Seemann1,2 — 1Saarland University, Experimental Physics, D-66123 Saarbrücken, Germany — 2Max Planck Institute for Dynamics and Self-Organization, D-37077 Göttingen, Germany
Wettability is an important factor that controls the front morphology during displacement of immiscible fluids. With the help of X-ray micro-tomography, we record the fluid front morphologies emerging during the fluid invasion into random piles of spherical beads. We identified two qualitatively different displacement regimes that are controlled by the advancing contact angle of the invading fluid. For the accurate characterization of the fluid front evolution, we considered several quantities related to the geometry of the interface. Extending our experiments to low contact angles and non-spherical grains, we found displacement patterns that differ substantially from those previously reported for spherical beads packs [1]. This result reveals the combined influence of wetting conditions and pore geometry on the global evolution of the fluid distribution.
[1] K. Singh, H. Scholl, M. Brinkmann, M. DiMichiel, M. Scheel, S. Herminghaus, and R. Seemann. Sci. Rep. 7: 444 (2017).