T型微通道中液滴的数值模拟

《T型微通道中液滴的数值模拟》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、15thAustralasianFluidMechanicsConferenceTheUniversityofSydney,Sydney,Australia13-17December2004NumericalsimulationofdropformationinaT-shapedmicrochannelJ.L.Liow11MechanicalEngineeringDiscipline,SchoolofEngineeringJamesCookUniversity,Qld,4811AUSTRALIAAbstractsmallerthantheslitwidth[1],ortheuseoffinep

2、oresandsteppedstructurestotryandproducereproducibledropsizesTheformationofwaterdropsofspecificsizewhenshearedby[11].MorecomplexnetworkofT-junctionshavebeenshownatetradecanestreamataT-junctioninamicrochannelwasin-toenabledropsizedistributionstobecontrolled(Linketal.asvestigatednumerically.Thenumerica

3、lresultsshowedthatthereferencedin[10]).Thecontrolofdropbreakupisinfluencedwaterdropsizesdecreasedwithincreasingtetradecaneflowratesignificantlybytheinterfacialtensionbetweenthetwofluidsanddecreasinginterfacialtension.ThisisinagreementwithandDreyfusetal.[3]havefoundthatwithoutthepresenceofpublishedexper

4、imentalresults.DuringtheformationoftheSpan80,dropsdonotforminmicrochannelsof20µmby200waterdrops,tworecirculatingzonesareformedinthewaterµmcrosssection.stream,alargeoneoccupyingmostofthewaterdrop,andasmalleronenearthedownstreamcorneroftheT-junction.TheInthisstudy,aT-junctionmicrochannelisnumerically

5、simu-smallerrecirculatingzoneresultsinahighpressurespot.latedusingavolumeoffluid(VOF)codein2Dtodeterminethebreakupofwaterdropsenteringintoaflowoftetradecane.IntroductionThisiscomparedtotheexperimentalresultofCole[2].Al-Inthelasttwodecades,theemphasisonfluidflowinMEMSthoughthedepthofthechannelmayaffectt

6、hedropformation,deviceshasbeenfocusedonthestudyofsinglefluidflows,in-muchinformationcanbeobtainedofthebehaviourofthedropvolvingonlyagasoraliquid[4].Incontrast,thedispersionbreakupcharacteristicsin2Dpriortoafullsimulationin3D.ofthedropletsofonefluidinasecondimmisciblefluidhasre-ceivedlessattention.Never

7、theless,thereisawiderangeofap-MathematicalformulationplicationsformultiphaseflowsinmicrochannelsandsuchflowsDetaileddescriptionofthemultifluidVOF(MFVOF)codehasarefoundinnaturallyoccurringsystems.Theabilitytoco