Real-time measurement of bubbling phenomena in a three-dimensional gas-fluidized bed using ultrafast magnetic resonance imaging
Real-time measurement of bubbling phenomena in a three-dimensional gas-fluidized bed using ultrafast magnetic resonance imaging
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DOI：
10.1103/physrevlett.96.154504
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发表时间：
2006-04-21
影响因子：
8.6
通讯作者：
Sederman, AJ
中科院分区：
文献类型：
--
作者：
Müller, CR;Davidson, JF;Sederman, AJ
首次应用超快磁共振成像技术同时测量气固两相流中气泡的上升速度和聚结速度，以及固相动力学。在这里，我们考虑了内径为50 mm的塔内含0.5 mm颗粒的气态床内的流体力学，研究了气速在0.18-0.54m/S范围内的变化。这些数据具有足够的时间和空间分辨率，可以确定气泡大小以及合并事件后气泡大小和速度的演化。
Ultrafast magnetic resonance imaging has been applied for the first time to measure simultaneously both the rise velocities and coalescence of bubbles, and the dynamics of the solid phase in a gas-solid two-phase flow. Here, we consider the hydrodynamics within a gas-fluidized bed of particles of diameter 0.5 mm contained within a column of internal diameter 50 mm; gas velocities in the range of 0.18-0.54 m/s were studied. The data are of sufficient temporal and spatial resolution that bubble size and the evolution of bubble size and velocity following coalescence events are determined.