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1、ISIJInternational,Vol.54(2014),No.6,pp.1314–1323Euler-Euler-LagrangianModelingforTwo-PhaseFlowandParticleTransportinContinuousCastingMoldZhong-qiuLIU,1)Bao-kuanLI,1)*Mao-faJIANG1)andFumitakaTSUKIHASHI2)1)SchoolofMaterialsandMetallurgy,NortheasternUniversity,Shenyang,110819China.2)DepartmentofAdva
2、ncedMaterials,GraduateSchoolofFrontierScience,TheUniversityofTokyo,5-1-5Kashiwanoha,Kashiwa,Chiba,277-8561Japan.(ReceivedonDecember11,2013;acceptedonFebruary14,2014)AmathematicalmodelbasedontheEuler-Euler-Lagrangianapproachhasbeendevelopedtostudytheinfluenceofargongasinjectiononthemoltensteelflow
3、andparticletransportbehaviorsincontinuouscastingmold.Themodifiedk-εmodelwithextrasourcetermtoaccountforthebubble-inducedturbu-lenceisadoptedtomodeltheturbulenceinthissystem.ThetransportofparticleissimulatedusingaLagrangianapproachbasedonthecomputedtwo-phaseflowfields.A1/4thscalewatermodelhasbeend
4、evelopedtoinvestigatethebubblebehaviorandfluidflowpattern.Airisinjectedintothesubmergedentrynozzle(SEN)throughacircumferentialinletchamberwhichismadeusingspecially-coatedsamplesofmulliteporousbrick.Thepredictionsofgasbubbledistributionandfluidflowpatternareingoodagree-mentwiththewatermodelexperim
5、entalobservations.Argonbubblescanchangetheflowpatternintheupperrecirculationzoneofthemold,increasethefluctuationofthetopsurface,andshifttheimpinge-mentpointonthenarrowwall.Theeffectincreaseswithincreasingargongasflowrate,anddecreasingcastingspeedandbubblesize.Argongasinjectionenhancestheremovalof
6、particles.Theoptimumargongasflowratebetween5and10L/min,castingspeedbetween0.7and0.8m/min,andargonbubblesizearound2.5mmareobtainedusingthismodeltoimprovetheremovalofparticles.KEYWORDS:continuouscastingmold;Euler-Euler-Lagrangianapproach;two-phaseflow;particletransport.whichweremeasuredwithaLaserDo
7、pplerVelocimeter.1.Introduction14)Esakaetal.showedthattheentrapmentofargonbubblesControloffluidflowinthecontinuouscastingmoldisdependsontheroughnessofsolidliquidinterface.Singhet15)importantduetoitseffectonthevariousph
