NumericalHeatTransfer（数值传热学）Chapter8NumericalSimulationforTurbulentFlowandHeatTransfer(Chapter9inTextbook)1/82
1/82 Numerical Heat Transfer (数值传热学) Chapter 8 Numerical Simulation for Turbulent Flow and Heat Transfer（Chapter 9 in Textbook）
Road map of 4ohrsteachingforbasic theoryYou can solveturbulentprobsHighlightsfor solvingin irregular regionincompressibleFFHTThree mathfeaturesTurbulence modelsSolution ofIrregulardomainFlowprob.DescretizationAlgorithms:OfconvectionAppliedtoSIMPLE,termsolveSIMPLER..DiffusionSchemes:prob.FUD,CD,SUD,QUICK...TDMA;MostASTM;Intermidiatefundamentals-LinearizationBasicpartpartGoverning eqs.Youcan solvelaminarflowYouhave laid a solidDomaindiscretizationandheattransferproblemsfoundationforadvancedEq.discretizationin regularregionstudyof CFDand NHT250
250 Road map of 40 hrs teaching for basic theory in
8.1Introductiontoturbulence8.2Time-averagedgoverning equationforincompressibleconvectiveheattransfer8.3Zero-equation and one-equation model8.4Two-equation model8.5Wallfunctionmethod8.6Low-Reynoldsnumberk-epsilonmodel8.7Briefintroductiontorecentdevelopments3/82
3/82 8.1 Introduction to turbulence 8.2 Time-averaged governing equation for incompressible convective heat transfer 8.3 Zero-equation and one-equation model 8.4 Two-equation model 8.5 Wall function method 8.6 Low-Reynolds number k-epsilon model 8.7 Brief introduction to recent developments
8.1Introductiontoturbulence8.1.1Presentunderstandingofturbulence8.1.2Classifications of turbulence simulation methods8.1.3 Reynolds time-averages and their characteristics4/82
4/82 8.1.1 Present understanding of turbulence 8.1.2 Classifications of turbulence simulation methods 8.1 Introduction to turbulence 8.1.3 Reynolds time-averages and their characteristics
8.1lntroductiontoturbulence8.1.1Present understandingofturbulence1. Turbulence is a highly complicated unsteady flow, withinwhich all kinds of physical quantities are randomly varying withboth time and space;2. Transient Naiver-Stokes are valid for turbulent flows;3. Turbulent flow field can be regarded as a collection ofeddies(涡漩）withdifferentgeometricscales.Eddyvs.vortex(漩涡)：Eddy is characterized by turbulentflowwith randomness, and it covers a wide range of geometric scales:Vortex is kind of flow pattern caused by a specific solid outlinecharacterized by a recirculation. Such vortex flow can be laminar orturbulent. The Chinese translations were proposed by Prof. G Z Liu（刘光宗）5/82
5/82 8.1 Introduction to turbulence 8.1.1 Present understanding of turbulence 1. Turbulence is a highly complicated unsteady flow, within which all kinds of physical quantities are randomly varying with both time and space； 2. Transient Naiver-Stokes are valid for turbulent flows； 3. Turbulent flow field can be regarded as a collection of eddies (涡漩）with different geometric scales . Eddy vs. vortex (漩涡)：Eddy is characterized by turbulent flow with randomness, and it covers a wide range of geometric scales; Vortex is kind of flow pattern caused by a specific solid outline characterized by a recirculation. Such vortex flow can be laminar or turbulent. The Chinese translations were proposed by Prof. G Z Liu （刘光宗）