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Investigation of wall slippage in suspensions by NMR imaging

  • A suspension of PMMA spheres in a density matched saccharose solution is investigated with a classical Searle rheometer and a NMR (Nuclear Magnetic Resonance) spectrometer. Here the NMR is used to measure the radial distribution of the PMMA spheres in the rotating cell, in addition to the local velocity profile of the suspension. The influence of particle concentration on the wall depletion is studied. Further analysis are carried out with computational fluid dynamics software. The velocity field as well as the solid distribution in the couette flow is simulated with a two-phase model including the Darcy law and compared to the experimental data.

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Metadaten
Author:Michael Modigell, Markus Hufschmidt, Johannes Koke, Christian Heine, Song-I Han, Siegfried Stapf, Jerzy Petera
Title (English):Investigation of wall slippage in suspensions by NMR imaging
URN:urn:nbn:de:bsz:959-opus-18340
Parent Title (English):Proceedings of the XIIIth International Congress on Rheology : Cambridge, UK, 20 - 25 August 2000 / BSR
Place of publication:Cambridge
Document Type:Conference Proceeding
Language:English
Year of Completion:2000
Release Date:2021/03/18
Tag:rheology; wall slippage
Pagenumber:3
Note:
XIIIth International Congress on Rheology : Cambridge, UK, 20 - 25 August 2000 / BSR
Faculties:Fakultät MKT / Institut für Duale Studiengänge
DDC classes:600 Technik, Medizin, angewandte Wissenschaften / 620 Ingenieurwissenschaften und Maschinenbau
Review Status:Veröffentlichte Fassung/Verlagsversion