Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 46: Poster: Wetting, Nano- and Microfluidics
CPP 46.12: Poster
Mittwoch, 9. März 2016, 18:15–21:00, Poster B2
Wetting Characteristics in Bidisperse Sphere Packings — •Robabeh Moosavi1, Julie Murison2, Martin Brinkmann1,3, and Matthias Schröter1 — 1Max-Planck Institute of Dynamics and Self-Organization, Göttingen, Germany — 2Clariant Produkte GmbH, Competence Center Interface and Formulation Technology, Frankfurt, Germany — 3Universität des Saarlandes, Saarbrücken, Germany
We report experiments on liquid two-phase flow in bidisperse sphere packings consisting of small and large beads which are either oil wetting or water wetting. Aim of our work is to understand the parameters determining the average wettability of these samples and their residual oil saturation after the packing was invaded by water. The former is studied by measuring the capillary pressure saturation curves [1], the latter by imaging the samples with X-ray tomography. We find that mixed wet samples show a smaller dissipation during a complete drainage/imbibition cycle than when the sample is composed of beads of one type of wetting behavior.
[1] Murison et al., Phys. Rev. Appl. 2014, 2, 034002