Multiphase flows are of major importance in today's industrial processes as many products originate from gas‐liquid reactions. The hydrodynamics within the wake behind the bubbles is essential as product selectivity is determined by the residence times in these mixing zones. Magnetic resonance imaging (MRI) offers a wide range of options for the investigation of multiphase flows. Here, non‐invasive MRI flow measurements of buoyancy‐driven N₂ Taylor bubbles, spatially fixed inside a countercurrent flow of water, are performed. An experimental setup is presented, enabling the generation of Taylor bubbles inside a horizontal bore MRI scanner. Furthermore, a suitable MRI sequence allowing a time‐dependent analysis of the present flow field is described. The obtained MRI results are qualitatively compared to PIV images acquired in the same setup.

中文翻译：

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磁共振成像技术用于无创研究气液泰勒流动中的流体动力学

多相流在当今的工业过程中至关重要，因为许多产品都来自气液反应。气泡后面尾流中的流体动力学至关重要，因为产物的选择性取决于在这些混合区中的停留时间。磁共振成像（MRI）为研究多相流提供了多种选择。浮力驱动N _2的无创MRI流量测量执行在空间上固定在逆流水内部的泰勒气泡。提出了一种实验装置，可以在水平孔MRI扫描仪内部产生泰勒气泡。此外，还描述了允许对当前流场进行时间依赖性分析的合适MRI序列。将获得的MRI结果与在相同设置中获取的PIV图像进行定性比较。