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NMR imaging as a new tool for rheology
Author(s) -
Sinton Steve W.,
Chow Andrea W.,
Iwamiya Joseph H.
Publication year - 1994
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19940860123
Subject(s) - rheology , materials science , newtonian fluid , non newtonian fluid , mechanics , suspension (topology) , complex fluid , rotational symmetry , microstructure , composite material , physics , mathematics , homotopy , pure mathematics
Examples of NMR imaging used to study the evolution of microstructure and flow velocities in sheared, highly filled suspensions are described. Fast NMR imaging methods were used to freeze the motion in a falling‐ball experiment, allowing us to monitor the local concentrations of suspended particles and ball position during the course of the experiment The migration of particles induced by shear and concentration gradients was followed in a Couette cell. Flow imaging methods were developed and applied to a Newtonian fluid and a non‐Newtonian suspension flowing in an axisymmetric pipe contraction.