具有树形流道双孔隙率多孔介质渗流特性研究  

The Permeability of Heterogeneous Porous Media Embedded With a Constructal Tree Network

作　　者：宋淦[1,2] 丁玉栋[1,2] 朱恂[1,2] 王宏[1,2] 廖强[1,2] 

机构地区：[1]重庆大学低品位能源利用技术及系统教育部重点实验室,重庆400030 [2]重庆大学工程热物理研究所,重庆400030

出　　处：《工程热物理学报》2015年第5期1101-1105,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51276205);国家自然科学基金重点资助项目(No.51136007);教育部科学技术研究项目(No.113053A);国家杰出青年科学基金项目(No.51325602);重庆市自然科学基金重点项目(No.cstc2013jjB9004)

摘　　要：设计具有合适孔道结构的吸附剂能有效提高吸附过程的效率。本文根据构形理论将树形流道嵌入到多孔介质基质中,构建了高渗透率的双孔隙率多孔介质。计算了树形流道内的无量纲压降分布、流道体积分数和渗透率随分叉级数的变化趋势。并利用双孔隙率多孔介质渗流模型计算了该多孔介质的有效渗透率。与并列直管道相比,树形流道在较大的分叉级数下具有更小的压降;树形流道的嵌入能够有效提高多孔介质的有效渗透率。The design of pore network of adsorbent could effectively promote the adsorption process.In this work,a dual-permeability system was built by embedding a constructal tree network into heterogeneous porous media to enhance the permeability of porous media.The variation of dimensionless pressure drop,volume fraction and permeability of the tree network along with the branching level was investigated.A dual-domain model was used to calculate the effective permeability of the porous system.According to the calculation results,porous media embedded with tree network exhibited smaller pressure drop compared with that embedded with parallel straight channel at high branching level.Embedding tree network could effectively enhance the permeability of porous media.

关 键 词：构形理论 树形结构 多孔介质 渗透率 

分 类 号：O357.3[理学—流体力学]