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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 30: Poster: Micro and Nanofluidics

CPP 30.9: Poster

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

Forced imbibition in porous media using in-situ X-ray microtomography — •Hagen Scholl¹, Marco Di Michiel², Kamaljit Singh¹, Mario Scheel², Stephan Herminghaus³, and Ralf Seemann¹ — ¹Saarland University, Experimental Physics, D-66041 Saarbrücken, Germany — ²European Synchrotron Radiation Facility, F-38000 Grenoble, France — ³MPI for Dynamics and Self-Organization, D-37073 Göttingen, Germany

The high energy beamline ID15 at the European Radiation Facility (ESRF) allows acquiring full 3D tomograms with micron scaled spatial resolution in less than 2 s. This time resolution is sufficient for an in-situ insight into the dynamics of driven multiphase flow in porous media. We investigate the motion of a water-oil front advancing into an oil filled granular pile composed of glass or basalt microspheres. We analyse the flow velocity of the aqueous phase, shape of the liquid front, the residual oil saturation on a pore size level. An initially straight liquid front roughens extremely quickly and a dynamic and repeatedly filling and draining of individual pore volumes is observed.