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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(guān)鍵詞：

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

資料大?。?/td>

598K

所屬學(xué)科：

分子表征

來(lái)源：

2007高分子材料加工國(guó)際學(xué)術(shù)會(huì)議（5.18-5.20 北京）

簡(jiǎn)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(shí)間：

2007-09-04 15:07:13

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