CIESC Journal ›› 2008, Vol. 59 ›› Issue (9): 2214-2219.
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GUO Xueyan,DAI Ren,WANG Hongguang
Online:
Published:
郭雪岩,戴韧,王宏光
Abstract:
A finite volume formulation based on the 3D Chimera grid generation techniques was applied to numerical investigation of the small Reynolds number(9—50)local flows in fixed-bed reactors that were randomly packed with spheres.Due to the inhomogeneous distribution of porosity in the randomly packed fixed-beds,flow fields in fixed-beds are usually rather inhomogeneous.The present study investigated two different packed-bed configurations,which contained 120 and 500 spheres with diameter ratios(reactor diameter to sphere diameter) of 7 and 10.To achieve the resource-consuming computations,PVM-based distributed parallel computations were applied on a cluster parallel system.The numerical simulation results provided rather detailed information of the local flow fields in the fixed-beds and showed that there existed,in both of the fixed-beds,strong flow inhomogeneity,wall effects and channeling flows.
Key words: 固定床, 数值模拟, Chimera网格, 并行计算, 局部流动
固定床,
摘要:
采用基于三维Chimera网格的有限体积方法对球形颗粒随机填充的固定床内部小Reynolds数(9~50)下的局部流动进行了数值模拟。为了考察固定床内局部流动特点,本文模拟的固定床反应器的填充颗粒的数目较大,分别为120和500,直径比(固定床内径与填充颗粒直径之比)分别为7和10。由于计算量巨大,采用了基于PVM的分布式并行计算。模拟结果提供了固定床内局部流动的详细流场信息,显示了流动的不均匀性、壁面效应和沟流的存在。为固定床内进一步的流动与传热及反应耦合研究奠定了基础。
关键词: 固定床, 数值模拟, Chimera网格, 并行计算, 局部流动
GUO Xueyan, DAI Ren, WANG Hongguang. 3D numerical simulation on Chimera grid for local flows in fixed-bed reactors[J]. CIESC Journal, 2008, 59(9): 2214-2219.
郭雪岩, 戴韧, 王宏光. 基于Chimera网格的固定床反应器内局部流动模拟 [J]. 化工学报, 2008, 59(9): 2214-2219.
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