摘要
基于以 Brinkman方程为基础的有效介质方法和一般的点阵模型 ,研究固定床层中多孔颗粒内部的流动特性 .在综合分析多孔颗粒内部流动特性及考虑有效粘性系数对速度分布影响后 ,推出了球形流体微团在多孔介质内部的受力公式 。
WT5”BZ]The features of intraparticle convection and transfer in the interior of porous particles in a fixed bed are investigated by an effective medium approach based on Brinkman equation and the swarm model presented by Davis and Stone.On the basis of their model,we analyze the properties of velocity and flow,consider the influence of effective viscous coefficient on velocity profile,and calculate the force exerted on a fluid element in the interior of porous particles in a fixed bed.Our results can explain the reason why the effect of transport can be enhanced du ring the flow through the interior of porous particles. [WT5”HZ]
出处
《天津大学学报（自然科学与工程技术版）》
EI
CAS
CSCD
2000年第5期553-559,共7页
Journal of Tianjin University：Science and Technology
基金
国家自然科学基金!(2 96760 30 )
关键词
多孔介质
颗粒内部流体
渗流力学
porous particles
intraparticle convection
force exerted on a fluid element
Brinkman equation
