Regensburg 2007 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 19: POSTER: Micro and Nano Fluidics

CPP 19.18: Poster

Mittwoch, 28. März 2007, 16:00–18:30, Poster B

Flow NMR of complex systems — •Ulrich Scheler and Frank Bagusat — Leibniz-Institut für Polymerforschung Dresden e.V, Hohe Str. 6, D-01069 Dresden

A combination of NMR imaging and pulsed field gradient (PFG) NMR is applied to investigate flow. NMR longitudinal relaxation is used to generate contrast in a binary system of oil and water. The spatial distribution of each component and its flow pattern are measured separately. As a model a Couette cell with an additional area of high shear is used as model geometry. While a flat smooth interface is found a t rest, the interface become bent under rotation, finally emulgation starts because of the velocitiy differences between the components. Flow from a submillimeter tube into a wide box and out of the box is investigated as well to understand shear-induced mixing and demixing.