Rapid MRI and velocimetry of cylindrical couette flow |
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| Institution: | 1. Hechel Smith Laboratory for Medicinal Chemistry, University of Cambridge, School for Clinical Medicine, Robinson Way, Cambridge, UK;2. Unilever Research, Colworth House Laboratory, Sharnbrook, Bedford, UK;1. Department of Physics, University of Ioannina, GR 45110 Ioannina, Greece;2. Department of Physics, University of Crete, P.O. Box 2208, GR 71003 Heraklion, Greece;3. Tandem Accelerator Laboratory, Institute of Nuclear and Particle Physics, NCSR Demokritos, GR 15310 Ag. Paraskevi, Greece;1. Graduate School of Biomedical Engineering, Tohoku University, 6-6-01 Aramaki-aza Aoba, Sendai 980-8579, Japan;2. Faculty of Systems Science and Technology, Akita Prefectural University, 84-4 Ebinokuchi, Tsuchiya-aza, Yuri-honjo 015-0055, Japan;3. School of Engineering, Tohoku University, 6-6-01 Aramaki-aza Aoba, Sendai 980-8579, Japan;1. Université de Haute Alsace (UHA), CNRS, Equipe Matériaux à Porosité Contrôlée (MPC), Institut de Science des Matériaux de Mulhouse (IS2M), UMR 7361, ENSCMu, 3 bis rue Alfred Werner, 68093 Mulhouse, France;2. Laboratory of Materials, Catalysis, Environment and Analytical Methods, Faculty of Sciences, Doctorate School of Science and Technology, Lebanese University, Lebanon |
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| Abstract: | A narrow-gap, temperature-controlled Couette flow rheometer has been developed to study fluid velocities within the annular gap between two concentric cylinders by nuclear magnetic resonance (NMR) imaging and velocimetry. Alternative pulsed-field-gradient-based nuclear magnetic resonance imaging strategies which may be used for measurement of velocity within the Couette flow device have been evaluated. These include two-dimensional (2-D) imaging techniques with acquisition times of several minutes and a one-dimensional (1-D) projection method which exploits the symmetry of the device to reduce overall measurement time to less than 1 min. Velocity measurements made using each technique are presented for a Newtonian fluid undergoing Couette flow at shear rates of approximately 20 and 60 s–1. |
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