We demonstrate the use of nuclear magnetic resonance (NMR) microscopy to image the velocity distribution for fluids sheared within the gaps (4° and 7°) of cone-and-plate rheometers. These measurements employ a specially constructed rheogoniometer, which fits within the NMR probe system. While the uniform shear rate assumption is verified in the case of simple Newtonian and non-Newtonian fluids, a range of anomalous behavior (apparent slip, shear banding, and fracture) is observed in other systems, including wormlike surfactants, semidilute solutions of 18 MDa polyacrylamide, and dispersed silica in silicone grease.
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Research Article| November 01 1997
Nuclear magnetic resonance visualization of anomalous flow in cone-and-plate rheometry
Special Collection: Shear Banding
Melanie M. Britton;
Melanie M. Britton, Paul T. Callaghan; Nuclear magnetic resonance visualization of anomalous flow in cone-and-plate rheometry. J. Rheol. 1 November 1997; 41 (6): 1365–1386. https://doi.org/10.1122/1.550846
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