The effect of displacement distribution asymmetry on the accuracy of phase-shift velocimetry in porous media

Vallatos, A., Shukla, M. N., Mullin, J. M., Phoenix, V. R. and Holmes, W. M. (2018) The effect of displacement distribution asymmetry on the accuracy of phase-shift velocimetry in porous media. Microporous and Mesoporous Materials, 269, pp. 130-133. (doi:10.1016/j.micromeso.2017.11.048)

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Abstract

Phase-shift velocimetry provided by pulsed magnetic field gradient experiments is the fastest magnetic resonance technique for measuring velocity. However, critical issues have been reported when studying flow through porous media. These lead to inaccurate velocimetry results, with no clear explanation emerging. In this work we investigate the effect of asymmetries in the distribution of intra-voxel displacements on the accuracy of phase-shift velocimetry. This is particularly relevant to flow through porous media, where the presence of stagnant pores or differential flow is known to result in asymmetric displacement distributions. Here, tailored intra-voxel distributions are achieved using a simple phantom combined with a single large voxel. Combining experimental results with simulations, we demonstrate that the presence of asymmetries in the intra-voxel displacement distributions, common in studies of porous materials, can lead to important velocimetry errors.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Holmes, Dr William and Phoenix, Dr Vernon and Vallatos, Dr Antoine and Shukla, Dr Matsyendra Nath and Mullin, Mr James
Authors: Vallatos, A., Shukla, M. N., Mullin, J. M., Phoenix, V. R., and Holmes, W. M.
College/School:College of Medical Veterinary and Life Sciences > Institute of Neuroscience and Psychology
College of Science and Engineering > School of Geographical and Earth Sciences
Journal Name:Microporous and Mesoporous Materials
Publisher:Elsevier
ISSN:1387-1811
ISSN (Online):1873-3093
Published Online:02 December 2017
Copyright Holders:Copyright © 2017 Elsevier Inc.
First Published:First published in Microporous and Mesoporous Materials 269:130-133
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
593081The black box opened: Non-invasive observation of nanoparticle transport in rock pore systems.Vernon PhoenixEngineering and Physical Sciences Research Council (EPSRC)EP/J017493/1SCHOOL OF GEOGRAPHICAL & EARTH SCIENCES