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RESEARCH PAPERS

Comparisons of Magnetic Resonance Imaging Velocimetry With Computational Fluid Dynamics

[+] Author and Article Information
B. Newling, S. J. Gibbs, J. A. Derbyshire, D. Xing, L. D. Hall

Herchel Smith Laboratory for Medicinal Chemistry, Forvie Site, Robinson Way, Cambridge, UK, CB2 2PZ

D. E. Haycock, W. J. Frith, S. Ablett

Unilever Research Laboratory, Colworth House, Sharnbrook, Bedford, UK, MK44 1LQ

J. Fluids Eng 119(1), 103-109 (Mar 01, 1997) (7 pages) doi:10.1115/1.2819094 History: Received August 08, 1995; Revised April 15, 1996; Online December 04, 2007

Abstract

The flow of Newtonian liquids through a pipe system comprising of a series of abrupt expansions and contractions has been studied using several magnetic resonance imaging (MRI) techniques, and also by computational fluid dynamics. Agreement between those results validates the assumptions inherent to the computational calculation and gives confidence to extend the work to more complex geometries and more complex fluids, wherein the advantages of MRI (utility in opaque fluids and noninvasiveness) are unique. The fluid in the expansion-contraction system exhibits a broad distribution of velocities and, therefore, presents peculiar challenges to the measurement technique. The MRI protocols employed were a two-dimensional tagging technique, for rapid flow field visualisation, and three-dimensional echo-planar and gradient-echo techniques, for flow field quantification (velocimetry). The Computational work was performed using the FIDAP package to solve the Navier-Stokes equations. The particular choice of parameters for both MRI and computational fluid dynamics, which affect the results and their agreement, have been addressed.

Copyright © 1997 by The American Society of Mechanical Engineers
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