磁気共鳴画像法による粒子濃厚分散流体の流速測定(機械要素,潤滑,工作,生産管理など)

概要

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Axial velocity profile of a steady tube flow was measured using magnetic resonance imaging (MRI). We used aqueous solutions of carboxymethyl cellulose (CMC) containing suspended particles such as glass flake and glass bead at high volume fractions. As a result, a plug-like velocity profile was observed at high shear rate in the tube flow. This velocity profile measured by MRI had a good agreement with that numerically calculated from the viscosity curve of the test fluid. Furthermore the effect of suspended particles on the flow field in the tube flow with abrupt contraction geometry is also examined. We observed a plug flow profile of velocity field for the CMC solution and the bead suspension, but a concave one near the centerline at upstream of the contraction for the concentrated flake suspension. This velocity profile is caused by the shape of the glass flake particle.
社団法人日本機械学会の論文
2006-03-25