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

資料類型：

Word文件

關鍵詞：

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

資料大小：

598K

所屬學科：

分子表征

來源：

2007高分子材料加工國際學術會議（5.18-5.20 北京）

簡介：

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

上傳時間：

2007-09-04 15:07:13

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598

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