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Shear Dynamics: Understanding Boundary Slip and Anomalies in the Structural and Dynamical Properties of Liquids Under Flow

  • Max WolffEmail author
Chapter
Part of the Neutron Scattering Applications and Techniques book series (NEUSCATT)

Abstract

Bulk liquids are characterized by an isotropic structure with short range correlations. For a static liquid, and at the boundaries, ordering is induced depending critically on the properties of the interface as well as on the topology. For liquids in motion, matters are more complicated. Shear impinges anisotropy and may induce ordering or inhomogeneities in the volume as well as close to the solid interface. This chapter summarizes recent experimental results on structural and dynamical investigations of liquids under flow (including engine oil, polymers and micelles), using a number of different neutron scattering techniques. The combination of diffraction and spectroscopy with surface sensitivity gives direct information to help us relate flow to structure and diffusivity in the region very near to the surface. Future perspectives on the use of grazing incident scattering techniques are discussed.

Keywords

Surface Slip Critical Angle Slip Length Small Angle Neutron Scattering Transmission Geometry 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The author acknowledges financial support of the DFG (MA801/12-2 and ZA161/18-2) within the priority program (SPP) 1164 and the BMBF (ADAM 03ZA7BOC). The author wants to thank Bernhard Frick for the excellent support during the measurements on IN16 and him as well as Andreas Magerl and Hartmut Zabel for fruitful discussions. Additionally, thanks to Nicole Voss for her help in finalizing the manuscript.

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© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  1. 1.Division for Materials Physics, Department of Physics and Astronomy ScienceUppsala UniversityUppsalaSweden

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