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Three-dimensional heat transfer in a particulate bed in a rotary drum studied via the discrete element method
Particuology ( IF 3.5 ) Pub Date : 2020-01-06 , DOI: 10.1016/j.partic.2019.10.007
Esmaeil Yazdani , Seyed Hassan Hashemabadi

We simulated three-dimensional heat transfer inside a horizontal rotating drum using the discrete element method and a thermal conduction model. The aim was to determine the effect of end-wall heating on thermal behavior of a granular bed. The simulation showed that the end-wall heating significantly affects the axial temperature profile of the bed, particularly when the length-to-diameter ratio is low. Particles near the wall heated faster and became more thermally uniform than those in the center of the drum. The region affected by the end heating gradually increased over time. Increasing the rotation speed enhanced the heat conduction rate, and increasing the fill level reduced the mean temperature and thermal uniformity of the granular bed. Heat transfer was also simulated for drums with different length-to-diameter ratios.



中文翻译:

通过离散元方法研究旋转鼓中颗粒床中的三维传热

我们使用离散元方法和热传导模型模拟了水平旋转滚筒内部的三维传热。目的是确定端壁加热对粒状床热性能的影响。模拟表明,端壁加热会显着影响床的轴向温度分布,特别是当长径比低时。壁附近的颗粒比鼓中央的颗粒加热得更快,并且变得更热均匀。随着时间的推移,受最终加热影响的区域逐渐增加。增加转速会提高热传导率,增加填充量会降低颗粒床的平均温度和热均匀性。还模拟了具有不同长径比的滚筒的热传递。

更新日期:2020-01-06
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