Dresden 2014 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 37: Poster Session 2
CPP 37.18: Poster
Wednesday, April 2, 2014, 15:00–19:00, P3
Forced Displacement Experiments in quasi 2D Porous Media. — •Michael Jung1,2, Marta Sanchez de la lama2, Stephan Herminghaus2, Martin Brinkmann1,2, and Ralf Seemann1,2 — 1Universität des Saarlandes, Saarbrücken, Germany — 2Max Planck-Institute for Dynamics and Self-Organization, Göttingen, Germany
As a model for a forced liquid displacement process into porous media, we study two-dimensional flow experiments in microfluidic devices. The devices and the porous structures are fabricated from oil-resistant UV-curable glue using soft-lithography. The devices were first saturated with oil (silicon oils, fluorinated oils or alkanes) and subsequently the oil was displaced by either a volume or pressure controlled water flush. We observe the global and local dynamic behavior of the advancing liquid fronts and the residual oil distribution using high speed microscopy as function of wettability, viscosity, flow velocity, and geometry of the pore space. Whereas the oil displacement is fairly insensitive to most parameters it shows a pronounced transition depending on wettability. These experimental results are compared to numerical simulations based on multiple particle collisions for analogous pore geometry and wetting conditions.