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Experimental and Numerical Study on a Bubbling Fluidized Bed with Wet Particles

机译：鼓泡湿床流化床的实验与数值研究

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As liquid bridge between particles acts an important role in the particle system, it is of considerable significance to analyze the flow hydrodynamics of wet particles in fluidized beds, which will improve the reactor design and process optimization. Thus, experimental and numerical investigations on wet particles in a bubbling fluidized bed are conducted in current work. On experimental side, particle image velocimetry (PIV) technology is employed with a designed bubbling fluidized bed. The silicone oil is used in this work because it is nonvolatile and transparent. On numerical side, a modified discrete element method (DEM) numerical method is developed by compositing an additional liquid-bridge module into the traditional soft-sphere interaction model. Most of the physical parameters are chosen to correspond to the experimental settings. Good agreements of particle velocity are found between the DEM simulation and PIV measurement. The performance of different liquid contents and superficial gas velocities are examined. (C) 2016 American Institute of Chemical Engineers
机译：由于颗粒之间的液桥在颗粒系统中起着重要作用，因此分析流化床中湿颗粒的流动流体动力学具有重要意义，这将改善反应器的设计和工艺优化。因此，在目前的工作中对鼓泡流化床中的湿颗粒进行了实验和数值研究。在实验方面，将颗粒图像测速（PIV）技术与设计的鼓泡流化床结合使用。硅油用于此工作是因为它不挥发且透明。在数值方面，通过将附加的液桥模块组合到传统的软球相互作用模型中，开发了一种改进的离散元方法（DEM）数值方法。选择大多数物理参数以对应于实验设置。在DEM模拟和PIV测量之间发现了良好的粒子速度一致性。检查了不同液体含量和表观气体速度的性能。 （C）2016美国化学工程师学会

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