In chemical industry, flows often occur in nontransparent equipment, for example in steel pipelines and vessels. Magnetic resonance imaging is a suitable approach to visualize the flow, which cannot be performed with classical optical techniques, and obtain quantitative data in such cases. It is therefore a unique tool to noninvasively study whole‐field porosity and velocity distributions in opaque single‐phase porous media flow. In this article, experimental results obtained with this technique, applied to the study of structure and hydrodynamics in packed beds of spherical particles, are shown and compared with detailed computational fluid dynamics simulations performed with an in‐house numerical code based on an immersed boundary method‐direct numerical simulation approach. Pressure drop and the radial profiles of porosity and axial velocity of the fluid for three packed beds of spheres with different sizes were evaluated, both experimentally and numerically, in order to compare the two approaches. © 2018 The Authors AIChE Journal published by Wiley Periodicals, Inc. on behalf of American Institute of Chemical Engineers AIChE J, 64: 1896–1907, 2018

中文翻译：

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球形颗粒填充床结构和流体力学的实验和数值研究

在化学工业中，流量经常发生在不透明的设备中，例如在钢管和容器中。磁共振成像是一种可视化流动的合适方法，这种方法无法用经典的光学技术执行，并且在这种情况下无法获得定量数据。因此，它是用于非侵入性研究不透明单相多孔介质流中全油田孔隙度和速度分布的独特工具。在本文中，展示了使用该技术获得的实验结果，该结果用于研究球形颗粒填充床的结构和流体动力学，并与基于浸没边界法的内部数字代码执行的详细计算流体动力学模拟进行了比较直接数值模拟方法。为了比较这两种方法，分别通过实验和数值方法对三个不同尺寸的球状填充床进行了压降以及流体径向孔隙率和轴向速度的评估，以进行比较。©2018 Wiley Periodicals，Inc.代表美国化学工程师学会出版的《作者AIChE期刊》AIChE J，64：1896–1907，2018