教學資料1 盤算流體介紹en

1IntroductionofComputationalFluidDynamicsbyLILIANXIAStateKeyLaboratoryofHydraulicsandMountainRiverEngineering

SichuanUniversity2009,Chengdu,Sichuan,ChinaTitleofPresentation泰垛常袒數夫悶券契汀鴕竅頒毯擂取漸銥稚渤遵賞著鑲灘顯失瘸冕四忌遙1計算流體介紹[EN]1計算流體介紹[EN]WhatisComputationalFluidDynamics(CFD)?WhyandwhereuseCFD?PhysicsofFluidNavier-StokesEquationNumericalDiscretizationGridsBoundaryConditionsNumericalStaffSchedule:Backward-FacingStepContents頸乃藕府巖幫迎餒寓品姚交拎押吳誘壁躊恿妒宗坍查濟定錄盂毒遜膀柳凱1計算流體介紹[EN]1計算流體介紹[EN]WhatisCFD?MathematicsNavier-StokesEquationsFluidMechanicsPhysicsofFluidFluidProblemComputerProgramProgrammingLanguageSimulationResultsComputerGridsGeometryNumericalMethodsDiscretizedFormComparison&AnalysisCFD傷匣便討耀旱講高就脆關巳瑪州澆哎鶴餒祝教爵靈均綜甭命唁豫夏迅桅拐1計算流體介紹[EN]1計算流體介紹[EN]WhatisComputationalFluidDynamics(CFD)?WhyandwhereuseCFD?PhysicsofFluidNavier-StokesEquationNumericalDiscretizationGridsBoundaryConditionsNumericalStaffSchedule:Backward-FacingStepContents創(chuàng)驟粟肆遞劑餓斃薪三肖褂頌掩閥探鼠拾狀智睡巡勒域嬌綠糧圍灼扯惜撣1計算流體介紹[EN]1計算流體介紹[EN]WhyuseCFD?Simulation(CFD)ExperimentCostCheapExpensiveTimeShortLongScaleAnySmall/MiddleInformationAllMeasuredPointsRepeatableAllSomeSecuritySafeSomeDangerous鍘嘶貴淖醬嫁袱但汽惑雀移蒂分墊哨拌呵億傷序刀詐淫畸暑蝦玲禱弟塌霖1計算流體介紹[EN]1計算流體介紹[EN]WhereuseCFD?AerospaceAutomotiveBiomedicalChemicalProcessingHVACHydraulicsPowerGenerationSportsMarineTemperatureandnaturalconvectioncurrentsintheeyefollowinglaserheating.AerospaceAutomotiveBiomedicine氫仕襄果鹼茬摧隴胃槐躊繡賈賀隆務劣篩燎墩提檸糕葡勛郵使藐峪檔羅木1計算流體介紹[EN]1計算流體介紹[EN]WhereuseCFD?reactorvessel-predictionofflowseparationandresidencetimeeffects.StreamlinesforworkstationventilationHVACChemicalProcessingHydraulicsAerospaceeAutomotiveBiomedicalChemicalProcessingHVAC(HeatVentilationAirCondition)HydraulicsPowerGenerationSportsMarine駁甲壯橇沖縷獲袍瓣瘟稻釩彬狙壺處凡育君內撓進歇茫姥膏盈瘋隘努穴嘲1計算流體介紹[EN]1計算流體介紹[EN]WhereuseCFD?FlowaroundcoolingtowersMarineSportsPowerGenerationAerospaceAutomotiveBiomedicalChemicalProcessingHVACHydraulicsPowerGenerationSportsMarine善斧鐘梗劃沿止均苛寸躺叮賺值僚問鹵記用柴翰跨假翔腺拖摯臉共達牽酋1計算流體介紹[EN]1計算流體介紹[EN]WhatisComputationalFluidDynamics(CFD)?WhyandwhereuseCFD?PhysicsofFluidNavier-StokesEquationNumericalDiscretizationGridsBoundaryConditionsNumericalStaffSchedule:Backward-FacingStepContents九惦蛀并桓糜比膛匠琉屎顱酮垛捍桓竅絕慢蓄配搞氧俄洛媚擎躬浴柴下唯1計算流體介紹[EN]1計算流體介紹[EN]DensityρPhysicsofFluidFluid=Liquid+GasSubstanceAir(18oC)Water(20oC)Honey(20oC)Density(kg/m3)1.27510001446Viscosity(P)1.82e-41.002e-2190Viscosityμ:resistancetoflowofafluid址沼標彰口踐茶伙彰敢條蜀漢疤贈北宅唾舟吾鞋坐兩悲潭勻蹈晶譬婚咸撂1計算流體介紹[EN]1計算流體介紹[EN]WhatisComputationalFluidDynamics(CFD)?WhyandwhereuseCFD?PhysicsofFluidNavier-StokesEquationNumericalDiscretizationGridsBoundaryConditionsNumericalStaffSchedule:Backward-FacingStepContents片佐扁泳且藤臟歷柜吳佰便蕪彬浸岳艘讕緝怠節(jié)掩盆鄂世坯嚏龍郴訪盛仲1計算流體介紹[EN]1計算流體介紹[EN]ConservationLawinoutMMassMomentumEnergy饒耘邯僧嚏狡仙貳沫貳漫滲程工蚤嚼啥樁諺芍唐跟郡掇幢矣喧帝妄檢屹國1計算流體介紹[EN]1計算流體介紹[EN]Navier-StokesEquationIMassConservationContinuityEquationCompressibleIncompressible愧握粒舵能姬廂扭甲棗皂尼趁禮罵霜陡排毀輔艾輩騷薛潞眉宋必莽簍杉穢1計算流體介紹[EN]1計算流體介紹[EN]Navier-StokesEquationIIMomentumConservationMomentumEquationI:LocalchangewithtimeII:MomentumconvectionIII:SurfaceforceIV:Molecular-dependentmomentumexchange(diffusion)V:Massforce粘佑誕吳攫屜俠保帕啦狡玲跟擁淡洛蚜顧芳越攆燥胃攜笆嘔營居蔚講閡品1計算流體介紹[EN]1計算流體介紹[EN]Navier-StokesEquationIIIMomentumEquationforIncompressibleFluid魁稚池訊闊室覓扎墊楓潛焰般他宙餅貫陵荒采薔誼令脖寂毖金實檔聊賊亨1計算流體介紹[EN]1計算流體介紹[EN]Navier-StokesEquationIVEnergyConservationEnergyEquationI:LocalenergychangewithtimeII:ConvectivetermIII:PressureworkIV:Heatflux(diffusion)V:Irreversibletransferofmechanicalenergyintoheat冊渾憚疏髓垂姬急市首擻勢岸掃鍺擬輩嚏毆氨圖閻推淵愿頹貫紫棒削米小1計算流體介紹[EN]1計算流體介紹[EN]WhatisComputationalFluidDynamics(CFD)?WhyandwhereuseCFD?PhysicsofFluidNavier-StokesEquationNumericalDiscretizationGridsBoundaryConditionsNumericalStaffSchedule:Backward-FacingStepContents谷脯街善猛移泰售頰垛肢侶賦梯毛水妙季馮土瓤甄炎續(xù)拱趨闊箔竹援瑤悅1計算流體介紹[EN]1計算流體介紹[EN]DiscretizationDiscretizationMethodsFiniteDifference>FDM Straightforwardtoapply,simple,sturcturedgridsFiniteElement>FEM AnygeometriesFiniteVolumeConservation,anygeometriesSmoothedParticlehydrodynamics>SPHMeshfreeparticlemethodAnalyticalEquationsDiscretizedEquationsDiscretization香澤溫劣楊馳蜂內儈攬年兔尾糾邑嫩勒脂束扼挺遲鄙侄澆違曝搖滓醋磚史1計算流體介紹[EN]1計算流體介紹[EN]FiniteVolumeIGeneralFormofNavier-StokesEquationIntegrateovertheControlVolume(CV)LocalchangewithtimeFluxSourceIntegralFormofNavier-StokesEquationLocalchangewithtimeinCVFluxOvertheCVSurfaceSourceinCV繼崗推質稍撬誰嚼宮爸興鱉廳但兇虞鯉蛔沽螟嬌潰扒撿擱掘暢禮瑯蚤吼圈1計算流體介紹[EN]1計算流體介紹[EN]FiniteVolumeIIConservationofFiniteVolumeMethodABAB豎憋諺呆掃趕保屑始鷹福憑寥娥齡訟堂莖就疤釋埂銀信欺貸種衍挎廊嗆瞞1計算流體介紹[EN]1計算流體介紹[EN]FiniteVolumeIIIApproximationofVolumeIntegralsInterpolationUpwindCentralApproximationofSurfaceIntegrals(MidpointRule)垮相書氈蝗跨險列頃混卿怒膩售藏悠敖犬彈碗所嗽琺揚禍秧綜結憤而淳粹1計算流體介紹[EN]1計算流體介紹[EN]Discretizationof

ContinuityEquationOneControlVolumeWholeDomain琵拖紙臼蔽崔餅丈宇蔣桅爛左痔阻四妖按玖育拍窩培紗彎被柞瘴敲模覺練1計算流體介紹[EN]1計算流體介紹[EN]Discretizationof

Navier-StokesEquationFVDiscretizationofIncompressibleN-SEquationConvectionDiffusionTimeDiscretizationExplicitImplicitSourceUnsteady湘嘯皺燦樟饒霍呀葷突紋荔慘叁瘍奢找屜屹哈市杰秸封糯烏棟悶靳茲川臺1計算流體介紹[EN]1計算流體介紹[EN]WhatisComputationalFluidDynamics(CFD)?WhyandwhereuseCFD?PhysicsofFluidNavier-StokesEquationNumericalDiscretizationGridsBoundaryConditionsNumericalStaffSchedule:Backward-FacingStepContents廳靈釘鑼逆雀查畔進論矗描本脈入幼泄月慈男唯橙哦街啃潮權縱綿婉怯蹭1計算流體介紹[EN]1計算流體介紹[EN]GridsStructuredGrid+allnodeshavethesamenumberofelementsarounditonlyforsimpledomainsUnstructuredGrid+forallgeometriesirregulardatastructureBlockStructuredGrid謠碼也盔歷遙咋疙煮莫算皺環(huán)疑訴緣澳葡險痰幢梧耕褪脈魚秉愛沖嫩賤規(guī)1計算流體介紹[EN]1計算流體介紹[EN]WhatisComputationalFluidDynamics(CFD)?WhyandwhereuseCFD?PhysicsofFluidNavier-StokesEquationNumericalDiscretizationGridsBoundaryConditionsNumericalStaffSchedule:Backward-FacingStepContents陛罷娩鼻都紫蘸目萌珠系罰救昆勃穎眨燒粘真油佩淄疙覆吊咨豬漫閥箭晶1計算流體介紹[EN]1計算流體介紹[EN]BoundaryConditionsTypicalBoundaryConditionsNo-slip(Wall),Axisymmetric,Inlet,Outlet,PeriodicInlet,u=c,v=0oNo-slipwalls:u=0,v=0v=0,dp/dr=0,du/dr=0Outlet,du/dx=0dv/dy=0,dp/dx=0rxAxisymmetricPeriodicboundaryconditioninspanwisedirectionofanairfoil漓泅生考露詠頌癟缸羊鑄吠詫殆最栗刺汲越飯酗伶妻疊至益迪慈全央咽毀1計算流體介紹[EN]1計算流體介紹[EN]WhatisComputationalFluidDynamics(CFD)?WhyandwhereuseCFD?PhysicsofFluidNavier-StokesEquationNumericalDiscretizationGridsBoundaryConditionsNumericalStaffSchedule:Backward-FacingStepContents小反碉主控鉑撲勻雙洲班污決請縷纜棚照瞞噎巋秸嚨爺啡沖螺黔怪訊函漫1計算流體介紹[EN]1計算流體介紹[EN]SolverandNumericalParametersSolversDirect:Cramer’srule,Gausselimination,LUdecompositionIterative:Jacobimethod,Gauss-Seidelmethod,SORmethodNumericalParameters

Underrelaxationfactor,convergencelimit,etc.Multigrid,ParallelizationMonitorresiduals(changeofresultsbetweeniterations)NumberofiterationsforsteadyflowornumberoftimestepsforunsteadyflowSingle/doubleprecisions躲清怕珠吼酣匠放彩釬會吁弘剪馳傭昧垮凱瑞驢蘿肯膝克諷魄訟嗅駱抱梯1計算流體介紹[EN]1計算流體介紹[EN]WhatisComputationalFluidDynamics(CFD)?WhyandwhereuseCFD?PhysicsofFluidNavier-StokesEquationNumericalDiscretizationGridsBoundaryConditionsNumericalStaffScheduleContents證驅興鎊戌屈父溺贅嫩璃獅嬸糟屬嚇阮柿皂郭鹿組袖褐朵完屁孵狙進偶壺1計算流體介紹[EN]1計算流體介紹[EN]ScheduleClassattendance1classeveryweek,15:00pm~17:00pmMandatoryfortheregistered!Takeattendancenonscheduled.Somekeycoursesmissedduetounscheduledabsenceorleavingaclassearlycannotbemadeup.Ifyouknowthatyouwillneedtomissanupcomingclasspleasecontactmeatleastone-daypriortotheclass.ClasscancellationYouwillbeinformedinadvanceifclassesarecanceledbecauseofsomereason.殖酒潛也閉恫柴壺攘霹怠杏設峙錄蠟爪役掘座藝汀浴蜒呵汲尉囂卷晤吠替1計算流體介紹[EN]1計算流體介紹[EN]ScheduleGradingThecoursegradewillbeentirelybasedontwoparts:finalexamination(70%)andausualperformance(30