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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 30: Poster: Micro and Nanofluidics

CPP 30.5: Poster

Mittwoch, 24. März 2010, 17:30–19:00, Poster C

Visualizing Forced Imbibitions in Porous Media. — •Michael Jung, Kamaljit Singh, and Ralf Seemann — Universität des Saarlandes, Saarbrücken, Germany

As a simple model for forced liquid imbibitions into porous media, we study two-dimensional flow experiments in microfluidic devices, developed from oil-resistant UV-curable glue using a softlithography technique. These devices were first saturated with oil (silicon oils or alkanes). The oil was then displaced by flushing water. We observe the dynamic behavior of liquid front using a CCD camera. The effect of various parameters, such as fluid densities, viscosities, water flow velocities and the size and geometry of the pore space, on the position and the behavior of the liquid front as well as the remaining fraction of trapped oil was investigated in detail.