Page 140 - 《水资源与水工程学报》2023年第4期
P. 140

!34 " ! 4 #                       & ' ( ) & * + , -                               Vol.34No.4
               2023 $ 8%                JournalofWaterResources&WaterEngineering                 Aug.,2023

            DOI:10.11705/j.issn.1672-643X.2023.04.16


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                 MNOPQ:TV131.3   7RSTU:A    7VWQ:1672643X(2023)04013610

                         Numericalsimulationonhydrauliccharacteristicsofsteady
                                      flowinchannelswithpartialicecover

                                                                          2
                                                          2
                                              1,2
                                  CHENGang ,JINDong,LAIYancheng,LIYingjin             2
              (1.StateKeyLaboratoryofHydrology-WaterResourcesandHydraulicEngineering,HohaiUniversity,Nianjing210098,China;
                         2.YunnanInstituteofWaterandHydropowerEngineeringInvestigation,Kunming650021,China)
                 Abstract:TheFluentbasedReynoldsstressmodelwasappliedtosimulatethehydrauliccharacteristics
                 ofsteadyuniformflowinchannelswithpartialicecoverintermsofstreamwisevelocity ,secondaryflow,
                 Reynoldsstress,andturbulentkineticenergy.Thesimulatedresultsshowthattheformationofborderice
                 resultsintheredistributionofundericeflowonthecrosssection,thevelocityincreasesintheopenwater
                 subsection,butdecreasesintheundericesubsection.Theresultinglateralmomentumtransferproduces
                 acomplexsecondaryflowstructure,theshape,number,sizeandlocationofthevorticesvarywiththe
                 coverageoficecover.ThedistributionofReynoldsstressiscomplexwithnegativevalueinthenearcover
                 regionoftheundericesubsection ,andthenegativeregioniscloselyrelatedtotheicecoverage,which
                 formsaconvexshapetowardstheopenwatersubsection.Thedifferencesintheroughnessoficecover,
                 bedandsidewallresultinthevariationofturbulentkineticenergyinthecrosssection.Theturbulentki
                 neticenergyislargerintheundericesubsectionthanthatintheopenwatersubsection,indicatingthat
                 theformationofbordericehascomplicatedeffectsontheturbulencestructureoftheundericeflow.
                 Keywords:icecover;hydrauliccharacteristics;numericalsimulation;Reynoldsstressmodel

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