Sankey M H, Holland D J, Sederman A J, Gladden L F
Department of Chemical Engineering and Biotechnology, University of Cambridge, Pembroke Street, Cambridge CB2 3RA, UK.
J Magn Reson. 2009 Feb;196(2):142-8. doi: 10.1016/j.jmr.2008.10.021. Epub 2008 Nov 14.
Single-phase liquid flow in porous media such as bead packs and model fixed bed reactors has been well studied by MRI. To some extent this early work represents the necessary preliminary research to address the more challenging problem of two-phase flow of gas and liquid within these systems. In this paper, we present images of both the gas and liquid velocities during stable liquid-gas flow of water and SF(6) within a packing of 5mm spheres contained within columns of diameter 40 and 27 mm; images being acquired using (1)H and (19)F observation for the water and SF(6), respectively. Liquid and gas flow rates calculated from the velocity images are in agreement with macroscopic flow rate measurements to within 7% and 5%, respectively. In addition to the information obtained directly from these images, the ability to measure liquid and gas flow fields within the same sample environment will enable us to explore the validity of assumptions used in numerical modelling of two-phase flows.
核磁共振成像（MRI）已对诸如珠状填料和模型固定床反应器等多孔介质中的单相液体流动进行了充分研究。在一定程度上，这项早期工作代表了针对解决这些系统内气体和液体两相流这一更具挑战性问题的必要前期研究。在本文中，我们展示了在直径为40毫米和27毫米的柱体中包含的5毫米球体填料内，水和SF₆稳定液 - 气流动过程中气体和液体速度的图像；分别使用¹H和¹⁹F观测来获取水和SF₆的图像。从速度图像计算得到的液体和气体流速分别与宏观流速测量值在7%和5%的范围内相符。除了直接从这些图像获得的信息外，在相同样品环境中测量液体和气体流场的能力将使我们能够探索两相流数值建模中所使用假设的有效性。
