tmustmeetmassconservation,momentumconversationandenergyconservation.TheflowinpumpissupposedtobeD,steadyandincompressible.SocontinuityequationandN-Sequation,accordingtoBoussinesq’shypothesis,areexpressedinEq.():.TurbulentmodelThestandardk-equationsareappliedinsimulationofcomplexDturbulent.TheequationsareexpressedinEq.()[]:wherek,Cμ,ε,C,andCareturbulentmodelcoefficients,andthevalues,gotfromLaunder’srecommendedvalueandtestresult,respectivelyare.,.,.,.,and...ModelsandgridgenerationPro/EngineerwasusedtobuildDmodelsofimpellerandvolute;Gambitwasusedtomeshthemodelswithtrianglemesh.Thegridswerecheckedandoutput.ThemodelsareshowninFig.andthenumberofgridsislistedonTable..SimulationResultsandAnalysisFig.(a)showsthatinthenormal-speedmagneticdrivepump,theabsolutevelocityoffluidintheimpellerincreaseswiththegrowthofchannelradius;thedistributionofabsolutevelocityatthesamecircleiseven;absolutevelocityreachesthe•S-)图(a)显示,处于正常速度磁力驱动泵,叶轮中流体相对速度随着叶轮半径增加而增加,并在