Abstract Heat transfer through immersed tubes in pulsating fluidized beds was investigated computationally using an Eulerian-Eulerian approach. The effects of pulsating frequency and configuration of the immersed tubes were studied. At low pulsating frequency, more orderly bubbling behaviors were observed and these gave rise to more uniform heat transfer rates from all tubes. An interesting heat transfer behavior whereby the heat transfer coefficient distribution around an immersed tube alternated between a needle-like and a wide fan-shaped pattern was observed for the first time in this study. An increase in pulsating frequency caused the fluidized bed to exhibit fluctuating heat transfer rates. The staggered tube configuration considered in this study was observed to aid in the development of more orderly bubbling behaviors, with heat transfer coefficient of tubes in the bottom row exhibiting similar oscillation amplitudes.

中文翻译：

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脉动流化床中浸入管的传热

摘要 使用欧拉-欧拉方法通过计算研究脉动流化床中浸入管的传热。研究了脉动频率和浸入管结构的影响。在低脉动频率下，观察到更有序的鼓泡行为，这导致所有管的传热率更均匀。在本研究中首次观察到一种有趣的传热行为，其中浸入管周围的传热系数分布在针状和宽扇形图案之间交替。脉动频率的增加导致流化床表现出波动的传热速率。观察到本研究中考虑的交错管配置有助于发展更有序的冒泡行为，