摘要
利用Matlab软件计算了中空纤维透析器外壳内壁面（简称壁面）影响下，中空纤维随机分布、管外流场充分发展、纤维表面定质量流量时的管外流场分布，进而求得了不同填充密度下透析器的管外传质系数．结果表明，中空纤维的排布方式对传质系数有很大的影响，在所研究的中空纤维填充密度范围内（10％～50％），随着填充密度的增大，透析器的管外传质系数先变大，后变小；其随机性整体上逐渐减小．
Mass transfer coefficient is one of the main parameters to evaluate the performance of hollow fiber modules. With the help of Matlab software, the shell-side flow field was simulated numerically under the condition of well-developed fluid flow. The theoretical model considers the effects of both the inner wall of the module shell and the random distribution of the hollow fibers on the shell-side mass transfer performance. For different packing densities of hollow fibers, the concentration field and the shell-side mass transfer coefficients of dialyzers were obtained with the concentration boundary condition of constant wall flux. The results showed that the packing/distribution of hollow fibers had a great effect on the shell- side mass transfer coefficient. Within the range of packing density studied （10%-50%）, when the packing density increased, the shell-side mass transfer coefficient firstly increased and then decreased, and its randomicity decreased in general.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2006年第12期2823-2827,共5页
CIESC Journal
关键词
传质系数
随机分布
填充密度
中空纤维透析器
mass transfer coefficient
random distribution
packing density
hollow fiber module
