仿蜂巢形多孔介质模型内流体流动数值模拟研究  

Numerical simulation of fluid flow for honeycomb shaped porous medium model

作　　者：蒋静智[1] 马莉营 崔海亭[1] 彭培英[1] 朱海荣[1] JIANG Jingzhi;MA Liying;CUI Haiting;PENG Peiying;ZHU Hairong(School of Mechanical Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China)

机构地区：[1]河北科技大学机械工程学院,石家庄050018

出　　处：《功能材料》2018年第8期8102-8107,共6页Journal of Functional Materials

基　　金：河北省自然科学基金资助项目(2012208049);河北省教育厅科学研究重点支持资助项目(ZD2014011)

摘　　要：构建仿蜂巢形多孔介质模型,利用流体计算软件Fluent对流体在其内部的流动状况进行模拟,考察不同初始流速、不同孔径大小等参数对多孔介质内部流体的流动特性及其对微生物在多孔介质内部的附着生长情况的影响。研究结果表明,多孔介质内随初始流速的增大,流体剪切力增大,微生物在小孔内附着生长的几率降低;相同初始流速条件下,随多孔介质内部孔径的增大,适宜在多孔介质内微生物生长的区域减小,生物膜较难形成;多孔载体底层内的流速随载体厚度的增大而降低,导致多孔载体底层的微生物因得不到营养物质而脱落死亡。模拟范围内得到的最佳流体流动特性参数为初始流速0.001m/s和模型结构参数孔径直径20μm。A Honeycomb shaped porous medium model was constructed,the flow of the fluid inside it was numerically simulated by using software Fluent,the effects of different initial velocity and different pore size on the flow characteristics of porous media and their effects on the attachment and growth of microorganisms in porous media were investigated.The results show that with the increase of initial flow velocity in porous media,the fluid shear force increases,and the probability of microbial growth reduced.At the same condition of initial velocity,with the pore size increasing,the areas for microbial growth reduced,and it is difficult to form biofilm.With the thickness of porous carrier increasing,the velocity in the bottom of the porous carrier decreases,thus microorganisms on the bottom of porous carriers fall off because of no nutrients.The best parameters obtained in this simulation are the parameter of fluid flow characteristics is 0.001 m/s and the aperture diameter of model structure is 20μm.

关 键 词：多孔介质 仿蜂巢形 数值模拟 

分 类 号：TB34[一般工业技术—材料科学与工程]