膜科学与技术

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Moving mesh-based dynamic numerical simulation for the process of retaining pollution on ultrafiltration membrane

Authors： CUI Hai-hang，HU Xiao-jing，LIU Jun-fang.

Units： School of Environment and Municipal Engineering，Xi’an University of Architecture and Technology，Xi’an 710055

KeyWords： ultrafiltration；membrane fouling；numerical simulation; moving mesh

ClassificationCode：TQ028.8；X703

year,volume(issue):pagination： 2015,35(6):58-66

Abstract：

Different from theexistinganalytical solutionsandthe static numericalsimulation,this paper aims atthe problem ofultrafiltration membranefouling. We establishedthe computational fluid dynamics(CFD)–based research means with moving mesh skill. The physical modelcoupled free flow, porousmedia flowanddiluted species transportprocess. Grid velocityat the pollutant interface was decided by the summing of normalaccumulationof pollutantsandthe tangentialshear elution. Then the matching parameters inthisexpressionwere determinedbya hollowfiber membrane moduleexperiments. Thedynamicsimulationprocess about retaining pollutantsonthe membrane surface was realized.On the basis ofthe established dynamicmodel,we studiedthe filtration performance with the differentmembrane surfacepattern (flat membraneandsinusoidal patterned membrane). The study showed thatthe distribution of shear stress onflatmembrane was more uniform and the fluxdecreased significantly. However, after a period of time, the specialshapesinusoidal patterned membrane generated an uneven distribution of shear stress on the peaks and valleys region, by which the betteranti-pollution performance was obtained and the membrane can maintain acertain degree offiltration fluxfor a long time. In summary, the establishedmodel provides an effectivemeans for thein-depth studyof pollutantsinterceptionprocessand optimizingdesignof the membrane module.

Funds：

西安建筑科技大学创新团队

AuthorIntro：

崔海航(1975- )，男，陕西咸阳人，博士，副教授，主要研究膜科学方向，Tel:13319206754，E-mail:cuihaihang@xauat.edu.cn.

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