Flows in periodically driven cavity (PDC): Flow structures and mixing behaviour of Newtonian, viscoelastic and reacting fluids，2007高分子材料加工国际学术会议（5.18-5.20 北京）-中国聚合物网,论文下载

Flows in periodically driven cavity (PDC): Flow structures and mixing behaviour of Newtonian, viscoelastic and reacting fluids

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Word文件

关键词：

Flows periodically driven cavity PDC Flow structures
mixing behaviour Newtonian viscoelastic reacting fluids

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598K

所属学科：

分子表征

来源：

2007高分子材料加工国际学术会议（5.18-5.20 北京）

简介：

Flowstructuresandmixingbehaviourareimportantaspectstobeanalyzedforpolymerprocessingoperations.Mostoften,theviscoelasticnatureoffluidsandthepresenceofreactionshavetobeconsideredtoobtainacompleteunderstanding.Itisalsoknownthatkinematicmixingdominatesoverdiffusionalmixinginpolymericmaterials.Theflowofviscoelasticfluidsalsooffersanextremelyinterestingsetofproblemsandhasbeenthefocusofresearchactivitiesoverthelastfewdecades.Duetothecomplexitiesofviscoelasticfluidflow,thedifferentbenchmarkgeometrieshavebeenstudieswhichincludesuddenexpansion(Stielmeieretal.,1989),channelflow(Yamamotoetal.,2003)etc.Lid-drivencavityisonesuchgeometryandtheflowofnon-Newtonianfluidsinlid-drivencavitieshasbeenstudiedbymanyresearchers(Grilletetal.,1999).Suchkindofgeometriesareencounteredinvariouspolymerprocessingoperationsparticularlyininjectionmoldinganddiecastingareofpracticalinterest(Anderson,1999).Atimescaleincavityflowscanbeintroducedinperiodicallydrivencavities(PDC)andthesehavebeenshowntobeprototypicalmixingdevices(Anderson,1999).TheflowandmixingofNewtonianfluidsinperiodicallydrivencavitieshaverecentlybeenstudiedinourgroup(Srirametal.,2006:1,2).ThetemporalandspatialvariationsandthestreamlinepatternsfromPIVmeasurementswerecomparedwithCFDsimulationsforawiderangeofRe.Thekinematicmixingwasalsoinvestigatedanditwasfoundthattheextentofmixingincreaseswiththeamplitudeandfrequencyoftheplatemotion.

作者：

S. Sriram, M. Harini, Abhijit P. Deshpande*, S. Pushpavanam

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2007-09-04 15:07:13

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