Magnetic resonance characterization of coupled gas and particle dynamics in a bubbling fluidized bed
Magnetic resonance characterization of coupled gas and particle dynamics in a bubbling fluidized bed
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DOI：
10.1103/physrevfluids.1.074201
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发表时间：
2016-11-02
影响因子：
2.7
通讯作者：
Holland, D. J.
中科院分区：
文献类型：
--
作者：
Boyce, C. M.;Rice, N. P.;Holland, D. J.
颗粒材料和气体之间的相对流动可以产生这样的现象，其中颗粒表现得像液体，气泡通过它们上升。本文利用磁共振成像技术测量了鼓泡流化床内气固两相的速度。与理论计算结果的比较表明，经典解析理论预测的颗粒间气体平均速度是正确的。实验也被用来验证从计算机模拟的气体和固体运动的预测。实验结果表明，在鼓泡区和乳化区的气体速度分布很广，为计算和分析理论提供了不同的方向。
Relative flow between granular material and gas can create phenomena in which particles behave like a liquid with bubbles rising through them. In this paper, magnetic resonance imaging is used to measure the velocities of the gas and solid phases in a bubbling fluidized bed. Comparison with theory shows that the average velocity of gas through the interstices between particles is predicted correctly by classic analytical theory. Experiments were also used to validate predictions from computer simulations of gas and solid motion. The experiments show a wide distribution of gas velocities in both bubbling and emulsion regions, providing a different direction for computational and analytical theory.