12.1.2 ANSYS Fluent sofiFluid flow:2D planar, 2D axisymmetric,2D axisymmetric withswirl (rotationally symmetric), and 3D flows.Incompressible or compressibleflows,including all speed regimes(low subsonic, transonic, supersonic, and hypersonic flows)Heat Transfer: Conduction/Convection/Radiation Heat TransferMultiphase Flow,Fluid-Structure Interaction, Turbulence ModelingCombustions/PollutionDistribution21/253
21/253 12.1.2 ANSYS Fluent soft Multiphase Flow, Fluid-Structure Interaction, Turbulence Modeling Heat Transfer: Conduction/Convection/Radiation Heat Transfer Combustions/Pollution Distribution Fluid flow: 2D planar, 2D axisymmetric, 2D axisymmetric with swirl (rotationally symmetric), and 3D flows. Incompressible or compressible flows, including all speed regimes (low subsonic, transonic, supersonic, and hypersonic flows)
12.1.3 How Does NHT Software Work?Fluent solvers are based on the finite volume method1)Domain is discretized into a finite set of control volumes.(Chapter2.DiscretizationofComputationalDomain计算区域与控制方程的离散化2) General conservation equations for mass, momentum, energy, etc.are solved onthis setof volumes.(Chapters5.Discretized Schemes ofDiffusion and ConvectionEquation：第5章：对流扩散方程的离散格式3)Partial differentialequations arediscretizedintoasystem of algebraic equations.(Chapter5:DiscretizedControlVolume"Schemes of Diffusionand Convection Equation)4)Allalgebraicequationsarethen solved numericallytoFluid region of pipe flow isobtain the solution field.(Chapter 7 Solution Methods fordiscretizedinto a finite setAlgebraicEquations第7章：代数方程的求解方法）of controlvolumes22/253
22/253 Fluent solvers are based on the finite volume method. 3) Partial differential equations are discretized into a system of algebraic equations.(Chapter 5: Discretized Schemes of Diffusion and Convection Equation) Fluid region of pipe flow is discretized into a finite set of control volumes 1) Domain is discretized into a finite set of control volumes.(Chapter 2.Discretization of Computational Domain计算区域与控制方程的离散化) 2) General conservation equations for mass, momentum, energy, etc. are solved on this set of volumes. (Chapters 5. Discretized Schemes of Diffusion and Convection Equation；第5章：对流扩散方程的离散格式) 4) All algebraic equations are then solved numerically to obtain the solution field.(Chapter 7 Solution Methods for Algebraic Equations第7章：代数方程的求解方法) 12.1.3 How Does NHT Software Work?
12.2. NHT Modeling OverviewSolverEquations solved onmeshPre-ProcessingTransport EquationsPhysical ModelsMeshModelermassGenerator.Turbulencemomentum.CombustionenergySupporting Physical.RadiationSolver SettingsModelsMultiphase.PhaseChangeMaterialPropertiesMovingPost-ProcessingBoundaryConditionsZonesInitial ConditionsMoving Mesh23/253
23/253 12.2. NHT Modeling Overview • Transport Equations – mass – momentum – energy • Supporting Physical Models Solver Physical Models Turbulence Combustion Radiation Multiphase Phase Change Moving Zones Moving Mesh Mesh Generator Material Properties Boundary Conditions Initial Conditions Solver Settings Pre-Processing Modeler Post-Processing Equations solved on mesh
12.2.1 NHT Analysis: Basic StepsProblemIdentificationandPre-Processing1.Defineourmodelinggoals.（控制方程及边界条件）2.Identify the domain we will model.3.Designandcreatethegrid.（计算区域与控制方程的离散化，第1和2章）SolverExecution4.Setupthenumericalmodel.（算法和格式选择，第5，6章）5.Computeandmonitorthesolution.（方程求解，第7章）Post-Processing6.Examinetheresults7.Considerrevisions to themodel1253
24/253 12.2.1 NHT Analysis: Basic Steps Problem Identification and Pre-Processing Solver Execution Post-Processing 1. Define our modeling goals.（控制方程及边界条件） 2. Identify the domain we will model. 3. Design and create the grid. (计算区域与控制方程的离散化，第1和2章) 4. Set up the numerical model.(算法和格式选择，第5，6章) 5. Compute and monitor the solution.(方程求解，第7章) 6. Examine the results. 7. Consider revisions to the model
1.Define Our Modeling GoalsI) What results are we looking for,and how will they be used?What are our modeling options?What physical models will need to be included in our analysis?What simplifying assumptions do we have to make?What simplifying assumptions can we make?Could we use user-defined functions (written in C)?2)What degree of accuracyis required?3)How quickly do we need the results?25/253
25/253 1. Define Our Modeling Goals 1) What results are we looking for, and how will they be used? • What are our modeling options? • What physical models will need to be included in our analysis? • What simplifying assumptions do we have to make? • What simplifying assumptions can we make? • Could we use user-defined functions (written in C)? 2) What degree of accuracy is required? 3) How quickly do we need the results?