资源描述：
《Experimental and numerical study on the flow characteristics in curved rectangular microchannels.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、AppliedThermalEngineering30(2010)1558e1566ContentslistsavailableatScienceDirectAppliedThermalEngineeringjournalhomepage:www.elsevier.com/locate/apthermengExperimentalandnumericalstudyontheflowcharacteristicsincurvedrectangularmicrochannelsa,*abJiann-CherngChu,Jyh-TongTeng,
2、RalphGreifaDepartmentofMechanicalEngineering,ChungYuanChristianUniversity,Chung-Li,Taiwan32023,ROCbDepartmentofMechanicalEngineering,UniversityofCalifornia,Berkeley,CA94720,USAarticleinfoabstractArticlehistory:Inthispaper,theflowcharacteristicsincurvedrectangularmicrochann
3、elswithdifferentaspectratiosReceived9September2009andcurvatureratiosforRenumbersrangingfrom80to876areinvestigated.TheobtainedexperimentalAccepted5March2010resultsarecomparedwithsimulatedvaluesbasedonclassicalNaviereStokesequationsandavailableAvailableonline12March2010corr
4、elationintheliterature.Anempiricalequationbasedonexperimentaldataisproposedtoprovideabetterpredictionofthefrictionalpressuredropinthecurvedrectangularmicrochannels.Keywords:Ó2010ElsevierLtd.Allrightsreserved.CurvedmicrochannelsExperimentalstudyFlowcharacteristicsDeannumbe
5、r1.Introductionlaminarandturbulentwerefoundtobelessthanthosepredictedfromtheconventionalcorrelations.Duetotherapiddevelopmentsinmicro-electronicsandPengetal.[7]experimentallyinvestigatedtheflowcharacteristicsbiotechnologies,theappliedresearchesinmicro-coolers,micro-ofwater
6、flowingthroughrectangularmicrochannelswithhydraulicbiochips,micro-reactors,andmicro-fuelcellshavebeenmovingatdiametersrangingfrom133to367mmandaspectratiosfrom0.333atremendouspace[1].Amongvariousmicro-fluidicdevicesandto1.Theirexperimentalresultsindicatedthattheflowfrictionel
7、ements,thecurvedmicrochannelisidentifiedtobeoneofthebehaviorsofboththelaminarandturbulentflowswerefoundtoessentialelementsforimprovingheattransferperformance,departfromtheclassicalcorrelations.Thegeometricalparametersshiftingfluidflowdirection,enhancingmixedefficiencyandsuchas
8、hydraulicdiameterandtheaspectratiowerefoundtohaveincreasingfluidpathwithinaminiaturearea[2e4].The
