CFD Study on Local Fluid-to-Wall Heat Transfer in Packed Beds and Field Synergy Analysis  

作　　者：PENG Wenping XU Min HUAI Xiulan LIU Zhigang 

机构地区：[1]Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China [2]University of the Chinese Academy of Sciences, Beijing 100049, China [3]Energy Research Institute of Shandong Academy of Sciences, Jinan 250014, China

出　　处：《Journal of Thermal Science》2016年第2期161-170,共10页热科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(51276181;51476173);the National Basic Research Program of China(2011CB 710705)

摘　　要：To reach the target of smaller pressure drop and better heat transfer performance, packed beds with small tube-to-particle diameter ratio(D/dp<10) have now been considered in many areas. Fluid-to-wall heat transfer coefficient is an important factor determining the performance of this type of beds. In this work, local fluid-to-wall heat transfer characteristic in packed beds was studied by Computational Fluid Dynamics(CFD) at different Reynolds number for D/dp=1.5, 3.0 and 5.6. The results show that the fluid-to-wall heat transfer coefficient is oscillating along the bed with small tube-to-particle diameter ratio. Moreover, this phenomenon was explained by field synergy principle in detail. Two arrangement structures of particles in packed beds were recommended based on the synergy characteristic between flow and temperature fields. This study provides a new local understanding of fluid-to-wall heat transfer in packed beds with small tube-to-particle diameter ratio.

关 键 词：Packed bed Fluid-to-wall heat transfer Field synergy principle Computational fluid dynamics Heat transfer intensification 

分 类 号：TK124[动力工程及工程热物理—工程热物理] V211.3[动力工程及工程热物理—热能工程]