摘要
按层流流动理论,采用数值方法模拟了随机分布纤维束间纵向流动时的量纲1速度分布,讨论了中空膜组件中纤维的装填率对流动阻力系数fRe和纤维束间流量分布的影响,并得到了0.1≤≤0.7范围内的fRe与的关系式。模拟结果表明,对于随机分布的纤维束,纵向流动速度分布不均匀,存在明显的偏流现象;由Voronoi划分所得的子单元通道面积分布与流量分布存在一定的关系,装填率对此关系影响较小。流动阻力系数fRe明显小于相同装填率下纤维按正三角形排列时的数值,它的模拟值与Sullivant和Costello等的实验值基本一致,随装填率增大而增大。
According to laminar flow theory,a numerical method is employed to simulate the non-dimensional velocity distribution of axial flow in the shell side of the hollow fiber module.The effects of the packing ratio on the flow volume distribution and the flow resistance coefficient fRe are discussed,and the relationship between fRe and in the range 0.1≤≤0.7 is obtained.The simulation reveals that the axial flow exhibits non-uniform velocity distribution and obvious channel flow in the randomly distributed fiber bundle.The flow area of the sub-cell tessellated by Voronoi method has a certain relationship with the flow volume distribution.However,the packing ratio shows little effect on this relationship.The flow resistance coefficient fRe in the randomly distributed fiber bundle,which increases with the packing ratio,is apparently smaller than that in right triangle array fiber bundles,and matches well with the experimental results of Sullivant and Costello,et al.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2010年第5期1083-1088,共6页
CIESC Journal
基金
浙江省自然科学基金项目(Y406070)~~
关键词
随机分布
中空纤维
阻力系数
速度分布
数值模拟
randomly distribution
hollow fiber
resistance coefficient
velocity distribution
numerical simulation
