《CFX4培训》（英文版）Lecture 1 Introduction

AEATECHNOLoGY ENGINEERING SOFTWAR Lecture 1 Introduction CFX-4 CFX4.3V4.3.1H Introductory Training(Dec 1999)

CFX-4 Introductory Training (Dec 1999) 1-1 CFX-4.3 V4.3.1H Lecture 1 Introduction

AEATECHNOLOGY ENGINEERING SOFTWAR Performing a CFD Analysis Define the problem Geometry Domain in which the governing equations will be solved and solutions obtained Creation of multi-block structure Grid The geometry is split into many small volumes or cells forming a grid or mesh Conservation of mass, momentum, energy, etcare satisfied locally in each cell >U.VW.PT etc are defined at the center of each cel i. e collocated grid CFX-4 grids are body-fitted and"multi-block CFX-4 CFX4.3V4.3.1H Introductory Training(Dec 1999)

CFX-4 Introductory Training (Dec 1999) 1-2 CFX-4.3 V4.3.1H Performing a CFD Analysis Define the problem - Geometry > Domain in which the governing equations will be solved and solutions obtained > Creation of multi-block structure. - Grid > The geometry is split into many small volumes or cells forming a grid or mesh > Conservation of mass, momentum, energy, etc. are satisfied locally in each cell. > U, V, W, P, T, etc. are defined at the center of each cell, i.e. collocated grid > CFX-4 grids are “body-fitted” and “multi-block

AEATECHNOLoGY ENGINEERING SOFTWAR Performing a CFD Analysis Boundary conditions Needed on all external surfaces of geometry Physical considerations Fluid properties such as density and viscosity Selection of models such as k-e for turbulence combustion models etc CFX-4 CFX4.3V4.3.1H Multi-block grid Introductory Training(Dec 1999)

CFX-4 Introductory Training (Dec 1999) 1-3 CFX-4.3 V4.3.1H Performing a CFD Analysis - Boundary conditions > Needed on all external surfaces of geometry. - Physical considerations > Fluid properties such as density and viscosity > Selection of models such as k-e for turbulence, combustion models, etc. Multi-block grid

AEATECHNOLOG ENGINEERING SOFTWAR Performing a CFD Analysis Calculate the flow Flow solver options T4· Moco"bDI B λ函 CLUTEVILUE and parameters have ENTHALP to be defined Governing equations PRESLEE ELOCITY are solved V VELOCITY UVELOCITY pG必 Dynamic monitoring LTE就ATN西 of solution history Convergence has to 」欧 ESIDUAL FLOT be obtained SCALED EELDUALS ENTHALPY ETaLON UVELOCITY CFX-4 CFX4.3V4.3.1H Introductory Training(Dec 1999)

CFX-4 Introductory Training (Dec 1999) 1-4 CFX-4.3 V4.3.1H Performing a CFD Analysis Calculate the flow - Flow solver options and parameters have to be defined - Governing equations are solved - Dynamic monitoring of solution history - Convergence has to be obtained

AEATECHNOLoGY ENGINEERING SOFTWAR Performing a CFD Analysis Examine the results Either in numerical or graphical format CFX-4 CFX4.3V4.3.1H Introductory Training(Dec 1999)

CFX-4 Introductory Training (Dec 1999) 1-5 CFX-4.3 V4.3.1H Performing a CFD Analysis Examine the results - Either in numerical or graphical format

AEATECHNOLoGY ENGINEERING SOFTWAR CFD Analysis Using CFX-4 Pre-Processors CFX-Build CEx-F3D.Ma:Aeti Ex iL CFX-Meshimport Pr产d1代 CToL15 Block structure optimization nne Meal linner'af叫且x1 Fimph1fsectary matory Purge F1lcs standard Exanplco ather EKanp1os Radiation geometry file Import mesh from IDEAS/ PATRAN CFX-Setup CFⅩ- ENVIRONMENT CFX-4 CFX4.3V4.3.1H Introductory Training(Dec 1999)

CFX-4 Introductory Training (Dec 1999) 1-6 CFX-4.3 V4.3.1H CFD Analysis Using CFX-4 Pre-Processors: - CFX-Build - CFX-Meshimport: > Block structure optimization > Radiation geometry file > Import mesh from IDEAS/ PATRAN - CFX-Setup. CFX-ENVIRONMENT

AEATECHNOLoGY ENGINEERING SOFTWAR CFD Analysis Using CFX-4 Solver CFX-4 Batch process Post-Processor: CFX-Visualise CFX-Analyse Interactive Interface to other packages PLOT3D AVS WAVEFRONT IDEAS LEVEL VI IDEAS Master Series. PATRAN. FIELDVIEW CFX-4 CFX4.3V4.3.1H Introductory Training(Dec 1999)

CFX-4 Introductory Training (Dec 1999) 1-7 CFX-4.3 V4.3.1H CFD Analysis Using CFX-4 Solver: CFX-4 - Batch process. Post-Processor: CFX-Visualise / CFX-Analyse - Interactive - Interface to other packages: > PLOT3D, AVS, WAVEFRONT, IDEAS LEVEL VI, IDEAS Master Series, PATRAN, FIELDVIEW

AEATECHNOLoGY ENGINEERING SOFTWAR CFX-Builld Features CAD import IGES ProE, PATRAN Neutral, UnigraphiCs, CATIA, CADDS Parametric capabilities Completely menu driven graphical user interface(very intuitive Context sensitive online help 1-8 CFX-4 CFX4.3V4.3.1H Introductory Training(Dec 1999)

CFX-4 Introductory Training (Dec 1999) 1-8 CFX-4.3 V4.3.1H CFX-Build Features CAD import - IGES - ProE, PATRAN Neutral, Unigraphics, CATIA, CADDS. Parametric capabilities. Completely menu driven graphical user interface (very intuitive). Context sensitive online help

AEATECHNOLOG ENGINEERING SOFTWAR Physical Models in CFX-4 Steady /Transient flow Buoyancy Laminar flow Boussinesq approx Turbulent flow Full buoyancy for compressible flow k Low re k-8 Scalar transport (active passive) Low Re K-omega RNG K-8 Non-Newtonian models Algebraic Reynolds stress Power law Differential Reynolds stress Bingham plastic Reynolds flux Bird-Carreau Cross (Conjugate) Heat transfer Herschel-Bulkley Compressible flow Weakly compressible Fully compressible CFX-4 CFX4.3V4.3.1H Introductory Training(Dec 1999)

CFX-4 Introductory Training (Dec 1999) 1-9 CFX-4.3 V4.3.1H Physical Models in CFX-4 Steady/Transient flow Laminar flow Turbulent flow - k-e - Low Re k-e - Low Re K-omega - RNG k-e - Algebraic Reynolds stress - Differential Reynolds stress - Reynolds flux (Conjugate) Heat transfer Compressible flow - Weakly compressible - Fully compressible Buoyancy - Boussinesq approx. - Full buoyancy for compressible flow Scalar transport (active & passive) Non-Newtonian models - Power law - Bingham plastic - Bird-Carreau - Cross - Herschel-Bulkley

AEATECHNOLoGY ENGINEERING SOFTWAR Physical Models in CFX-4 Cartesian or cylindrical Combustion coordinates Mixed is burnt Rotating coordinates Coal combustion Oil combustion Sliding grid(combination NOx model of rotating/stationary mesh Eddy break up Multi-phase flows Magnussen soot model Homogeneous Chemical kinetics Free surfacesurface tension Link with preaction Multi-fluid Porous media MUSIG Radiation(optional) Solidification Discrete transfer Particle transport Monte carlo Spray drier model Grey /non-grey model Coal oil combustion CFX-4 CFX4.3V4.3.1H Introductory Training(Dec 1999)

CFX-4 Introductory Training (Dec 1999) 1-10 CFX-4.3 V4.3.1H Physical Models in CFX-4 Cartesian or cylindrical coordinates Rotating coordinates Sliding grid (combination of rotating/stationary mesh) Multi-phase flows - Homogeneous > Free surface, surface tension - Multi-fluid > MUSIG - Solidification Particle transport - Spray drier model - Coal & oil combustion Combustion - Mixed is burnt > Coal combustion > Oil combustion > NOx model - Eddy break up > Magnussen soot model Chemical kinetics - Link with PFDReaction Porous media Radiation (optional) - Discrete transfer - Monte Carlo - Grey / non-grey model