Berlin 2012 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 21: Poster: Wetting, Micro and nanofluidics
CPP 21.2: Poster
Mittwoch, 28. März 2012, 11:00–13:00, Poster A
Liquid Morphologies in granulates with various wettability — •Marc Schaber1, Mario Scheel3, Martin Brinkmann2, Marco Di Michiel3, and Ralf Seemann1,2 — 1Experimental Physics, Saarland University, D-66041 Saarbrücken — 2MPI for Dynamics and Self-Organization, D-37073 Göttingen — 3European Synchrotron Radiation Facility, F-38000 Grenoble
When adding liquid to dry granulates, the liquid forms a network of capillary bridges and complex liquid structures. Depending on wettability of the granules and geometry of the granular pile different liquid structures are formed. By means of X-ray micro-tomography we explore the liquid equilibrium distribution emerging within granular packs. Monodisperse and polydisperse glass and basalt microspheres are used as granules having small and large contact angle, respectively. By fluidizing the granulate the packing geometry of the granules is changed and the liquid equilibrium structures are destroyed. Using ultra-fast X-ray tomography we explore how the liquid is re-distributed and how the liquid morphologies are re-formed in a new equilibrium situation.