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  • 简介:EVALUATION OF HFAM ON A FLOW OVER A BACKWARD-FACING STEPEVALUATIONOFHFAMONAFLOWOVERABACKWARD-FACINGSTEP¥ZhangXiao-yuan;LiWei(...

  • 标签: hybrid finite analysis method NAVIER-STOKES LAMINAR
  • 简介:Inthiswork,weperformanumericalstudyofawaterflowoverasteppedspillway.ThisflowisdescribedbytheReynoldsaveragedNavier-Stokesequation(RANS)associatedwiththeturbulencek-εmodel.Theseequationsaresolvedusingacommercialsoftwarebasedonthefinitevolumeschemeandanunstructuredmesh.Theair-waterflowwasmodeledusingvolumeoffluid(VOF)andmultiphasicmethods.Thecharacteristicsoftheflowwereinvestigatedincludingthetotalpressure,thevelocityprofile,etc..Weanalyzetheeffectsontheflowstructureofthestepsandcountermarchinclination,theairinjectionthroughthecountermarchintothewaterflowandthedynamicswaterdischarges.Resultsshowthattheinclinationofthecountermarchrelativetotheverticalandtheairinjectionintothewaterflowincreasethetotalpressureintheneighbourhoodofthesteps.

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  • 简介:Spatio-temporalcharacteristicsofthewall-boundedturbulentmixinglayerflowoveranopenstepandasquare-edgedribwereextensivelystudiedinalow-speedwindtunnel.Simultaneousmeasurementsofwall-pressurefluctuationsandvelocitymeasurementswereperformedbyusingmicrophonearrayandX-wire/splitfim,respectively.

  • 标签: 湍流 流体动力学 非稳定流 计算流体力学 大规模旋涡结构