基于CFD的恒通量陶瓷膜厚度设计  

Membrane thickness gradient of isoflux ceramic membrane based on CFD

作　　者：邹琳玲[1] 漆虹[1] 邢卫红[1] 

机构地区：[1]南京工业大学化学化工学院,材料化学工程国家重点实验室,江苏南京210009

出　　处：《化工学报》2010年第10期2615-2619,共5页CIESC Journal

基　　金：教育部新世纪优秀人才支持计划项目(NCET-06-0506);江苏省高校科研成果产业化推进项目(J H07-014);江苏省“六大”人才高峰项目(06-A-048)~~

摘　　要：Membrane thickness has significant effect on permeability of membrane.In this work the membrane thickness gradient of isoflux ceramic membrane was calculated with the Navier-Stokes and Darcy equations,which governed the bulk flow and the flow through the membrane,respectively.The specific resistance of porous medium was calculated by Konzey-Carmen equation.The results showed that the membrane thickness was approximately linear to the distance in axial direction.The cross-flow velocity had a significant influence on the membrane thickness gradient along the axial direction,so it is necessary to choose different membrane thickness gradient along the axial direction to obtain uniform trans-membrane pressure at different cross-flow velocity.The effects of pressure and temperature were relatively insignificant.The result of this study may provide guidance on membrane preparation and application.Membrane thickness has significant effect on permeability of membrane.In this work the membrane thickness gradient of isoflux ceramic membrane was calculated with the Navier-Stokes and Darcy equations,which governed the bulk flow and the flow through the membrane,respectively.The specific resistance of porous medium was calculated by Konzey-Carmen equation.The results showed that the membrane thickness was approximately linear to the distance in axial direction.The cross-flow velocity had a significant influence on the membrane thickness gradient along the axial direction,so it is necessary to choose different membrane thickness gradient along the axial direction to obtain uniform trans-membrane pressure at different cross-flow velocity.The effects of pressure and temperature were relatively insignificant.The result of this study may provide guidance on membrane preparation and application.

关 键 词：恒通量膜 计算流体力学 膜厚度 

分 类 号：TQ028.8[化学工程]