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Numerical study of the hydrodynamics and heat transfer characteristics of gas–solid in a slit-less rotating fluidized bed in static geometry
Journal of Thermal Analysis and Calorimetry ( IF 4.4 ) Pub Date : 2020-08-04 , DOI: 10.1007/s10973-020-10070-w
Pavitra Singh , Pankaj Kalita , Pinakeswar Mahanta

A rotating fluidized bed in static geometry (RFB-SG) without slits is presented in this paper as a research objective. The concept of RFB-SG is highly beneficial in numerous industrial operations such as granular drying, particle coating, mixing, agglomeration, and combustion. In this study, a three-dimensional CFD model is developed using the commercial software ANSYS FLUENT 14.5, to investigate hydrodynamics and heat transfer characteristics of gas–solid in the vortex chamber. The analysis of the flow pattern of gas–solid and the prediction of fluidization capacity have been made, using appropriate parameters. The findings showed that the significant factors, such as inlet air velocity, solid-bed thickness, the volume fraction of solids, solids pressure, and heat transfer coefficient, influenced the reactor capacity. It is observed that the solid inventories of 300 and 500 g have been fluidized perfectly at inlet air velocities of 30 m s−1 and 44 m s−1, respectively. The overall operating and drying costs are found to be decreased due to the reduction in fluidization air requirements.



中文翻译:

静态几何中无缝旋转流化床中气固两相流体力学和传热特性的数值研究

本文提出了一种不带缝隙的静态几何旋转流化床(RFB-SG)作为研究目标。RFB-SG的概念在许多工业操作(例如颗粒干燥,颗粒涂层,混合,附聚和燃烧)中都非常有用。在这项研究中,使用商业软件ANSYS FLUENT 14.5开发了三维CFD模型,以研究涡旋室内气体-固体的流体动力学和传热特性。使用适当的参数对气固两相的流型进行了分析并预测了流化能力。研究结果表明,诸如进气速度,固相床厚度,固体体积分数,固体压力和传热系数等重要因素影响了反应堆的容量。-1和44 m s -1。由于流化空气需求的减少,发现总的操作和干燥成本降低了。

更新日期:2020-08-04
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