Chemically resolved NMR velocimetry
Chemically resolved NMR velocimetry
- Author(s): B. Newling ; S.J. Gibes ; L.D. Hall ; D.E. Haycock ; W.J. Frith ; S. Ablett
- DOI: 10.1049/ic:19960570
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- Author(s): B. Newling ; S.J. Gibes ; L.D. Hall ; D.E. Haycock ; W.J. Frith ; S. Ablett Source: IEE Colloquium on Advances in Sensors for Fluid Flow Measurement, 1996 page ()
- Conference: IEE Colloquium on Advances in Sensors for Fluid Flow Measurement
Of particular relevance to process engineering is the potential sensitivity of NMR imaging to fluid displacement, which allows measurement of fluid velocities (in the range mm/s to m/s), even in opaque fluids, in three spatial dimensions (NMR velocimetry). The chemical sensitivity of the NMR technique has often been overlooked in NMR velocimetry implementations, but we present one protocol for the simultaneous measurement of fluid velocity for the separate components of a flowing mixture of chemical compounds. The fluid flow in the expansion/contraction pipe system is found to be fully characterised in three spatial dimensions. Thus, chemically resolved NMR velocimetry allows a five-dimensional (three spatial, one temporal and one chemical shift) measurement to be made, non-invasively and in optically opaque liquids. (4 pages)
Inspec keywords: chemical shift; flow visualisation; velocity measurement; NMR imaging; two-phase flow; velocimeters
Subjects: Magnetic resonance spectrometers, auxiliary instruments and techniques; Measurement instrumentation and techniques for fluid dynamics; Multiphase flows; Velocity, acceleration and rotation measurement
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