简介：

简介：Oscillatingflowaroundacircularcylinderinthevicinityofaplanewallwasinvestigatedbysolvingthetwo-dimensionalincompressibleNavier-StokesequationswithafiniteelementGalarkinresidualmethod.TheeffectofthegapGDbetweenthecylindersurfaceandthewallontheflowbehaviorwasstudied.ForthecaseofGD≤0.25,theperiodicityintheflowisattributedtoboththeoutershearlayerinstabilityandtheoscillatingfrequency.AsGD>0.25,vortexsheddingoccursandtheperiodicityintheflowismainlyduetothecompetitionoftheoscillatingfrequencyandthevortexsheddingfrequencyfromanisolatedstationarycylinder.

简介：Inthispaper,aniterationmethodispresentedtocalculatethesteadynoseparationflowpastacircularcylinderwithbrokenline-shapedvelocityprofile.Ateachiterationstep,thestreamlinesofthelaststepareconsideredasequivorticitylinestodeterminethenewflowfield.Theiterativeprocessisstoppedwhencertainconvergencecriterionisreached.Severalexamplesaregivenwhichshowtheeffectivenessofthemethod.