AEATECHNOLoGY ENGINEERING SOFTWAR Lecture 7 CFX Command File CFX-Setup CFX-4 CFX-4.3V4.3.1H Introductory Training (Dec 1999)
CFX-4 Introductory Training (Dec 1999) 7-1 CFX-4.3 V4.3.1H Lecture 7 CFX Command File & CFX-Setup
AEATECHNOLoGY ENGINEERING SOFTWAR CFX Command File A command file(m#f fc)is required to run CFX-4 The command file defines Problem characteristics Physical models and parameters Material properties Equation solvers Convergence criteria收敛标准 boundary conditions Output options CFX-4 CFX-4.3V4.3.1H Introductory Training (Dec 1999)
CFX-4 Introductory Training (Dec 1999) 7-2 CFX-4.3 V4.3.1H CFX Command File A command file (m##.fc) is required to run CFX-4 - The command file defines > Problem characteristics > Physical models and parameters > Material properties > Equation solvers > Convergence criteria 收敛标准 > Boundary conditions > Output options
AEATECHNOLoGY ENGINEERING SOFTWAR CFX Command File The command language Uses commands(starting with >> Commands may have subcommands Keywords qualify the command Keywords may be followed by integers, real numbers characters CFX-4 CFX-4.3V4.3.1H Introductory Training (Dec 1999)
CFX-4 Introductory Training (Dec 1999) 7-3 CFX-4.3 V4.3.1H CFX Command File The Command Language - Uses commands (starting with >>) - Commands may have subcommands - Keywords qualify the command - Keywords may be followed by integers, real numbers, characters
AEATECHNOLoGY ENGINEERING SOFTWAR CFX Command File The top level commands are >>CFX4 >>MODEL TOPOLOGY (may be not necessary >>MODEL DATA >>SOLVER DATA >>CREATE GRID (may be not necessar >> MODEL BOUNDARY COND工T工ONS >>OUTPUT OPTIONS >>STOP 7-4 CFX-4 CFX-4.3V4.3.1H Introductory Training (Dec 1999)
CFX-4 Introductory Training (Dec 1999) 7-4 CFX-4.3 V4.3.1H CFX Command File The top level commands are >>CFX4 >>MODEL TOPOLOGY (may be not necessary) >>MODEL DATA >>SOLVER DATA >>CREATE GRID (may be not necessary) >>MODEL BOUNDARY CONDITIONS >>OUTPUT OPTIONS >>STOP
AEATECHNOLOG ENGINEERING SOFTWAR Case stud / This command file has been set up tion example >CFX4 >>OPT工ONS THREE DIMENSIONS BODY FITTED GRID CARTESIAN COORDINATES TURBULENT FLOW HEAT TRANSFER 工 NCOMPRESSIBLE FLOW STEADY STATE USE DATABASE >>MODEL DATA >> MAter工 ALS DATABASE >>SOURCE OF DATA >>FLUID DATA MATERIAL TEMPERATURE 2.8800E+02 MATERIAL PHASE GAS >>T工TLE PROBLEM TITLE MY FIRST CFX-4 COMMAND FILE CFX-4 CFX-4.3V4.3.1H Introductory Training (Dec 1999)
CFX-4 Introductory Training (Dec 1999) 7-5 CFX-4.3 V4.3.1H Case Study /* This command file has been set up */ /* for the T junction example */ >>CFX4 >>OPTIONS THREE DIMENSIONS BODY FITTED GRID CARTESIAN COORDINATES TURBULENT FLOW HEAT TRANSFER INCOMPRESSIBLE FLOW STEADY STATE USE DATABASE >>MODEL DATA >>MATERIALS DATABASE >>SOURCE OF DATA PCP >>FLUID DATA FLUID 'AIR' MATERIAL TEMPERATURE 2.8800E+02 MATERIAL PHASE 'GAS' >>TITLE PROBLEM TITLE 'MY FIRST CFX-4 COMMAND FILE
AEATECHNOLoGY ENGINEERING SOFTWAR Case stud >PROGRAM CON TROL MAXIMUM NUMBER OF ITERATIONS 200 OUTPUT MONITOR POSITIoN 0.1070.04760.0275 MASS SOURCE TOLERANCE 1.0000E-06 >>MODEL BOUNDARY CONDITIONS >>INLET BOUNDARIES PATCH NAME INLET1 NORMAL VELOCITY 4.0000E-01 * W VELOCITY 4.0000E-01 K3.2000E-04 EPSILON 1.5260E-05 TEMPERATURE 3.0500E+02 >>工 NLET BOUNDARIES PATCH NAME INLET2 NORMAL VELOCITY 6.0000E-01 * W VELOCITY -6.0000E-01 K7.2000E-04 EPSILON 5.1520E-05 TEMPERATURE 2.9500E+02 >>WALL BOUNDARIES PATCH NAME WALL1 CFX-4.3V4.3.1H TEMPERATURE 2.8800E+02 CFX-4 Introductory Training (Dec 1999)
CFX-4 Introductory Training (Dec 1999) 7-6 CFX-4.3 V4.3.1H Case Study >>SOLVER DATA >>PROGRAM CONTROL MAXIMUM NUMBER OF ITERATIONS 200 OUTPUT MONITOR POSITION 0.107 0.0476 0.0275 MASS SOURCE TOLERANCE 1.0000E-06 >>MODEL BOUNDARY CONDITIONS >>INLET BOUNDARIES PATCH NAME 'INLET1' /* NORMAL VELOCITY 4.0000E-01 */ W VELOCITY 4.0000E-01 K 3.2000E-04 EPSILON 1.5260E-05 TEMPERATURE 3.0500E+02 >>INLET BOUNDARIES PATCH NAME 'INLET2' /* NORMAL VELOCITY 6.0000E-01 */ W VELOCITY -6.0000E-01 K 7.2000E-04 EPSILON 5.1520E-05 TEMPERATURE 2.9500E+02 >>WALL BOUNDARIES PATCH NAME 'WALL1' TEMPERATURE 2.8800E+02 >>STOP
AEATECHNOLoGY ENGINEERING SOFTWAR Referring to Patches Both 2D&3d patches can be referred to in the command file to specify boundary conditions or physical properties Patch names are used for Inlets, pressure boundaries, walls, conducting boundaries, sources, body forces, resistances Patch group numbers are used for Mass flow boundaries conducting solids porous regions If more than two patches of the same type are used, distinct group numbers must be re assigned, numbers must be consecutive CFX-4 CFX-4.3V4.3.1H Introductory Training (Dec 1999)
CFX-4 Introductory Training (Dec 1999) 7-7 CFX-4.3 V4.3.1H Referring to Patches Both 2D & 3D patches can be referred to in the command file to specify boundary conditions or physical properties. Patch names are used for - Inlets, pressure boundaries, walls, conducting boundaries, sources, body forces, resistances. Patch group numbers are used for: - Mass flow boundaries, conducting solids, porous regions - If more than two patches of the same type are used, distinct group numbers must be reassigned, numbers must be consecutive
AEATECHNOLoGY ENGINEERING SOFTWAR Referring to Patches Examples Porous regions >>MODEL TOPOLOGY >>MODIFY PATCH Mass flow boundaries OLD PATCH NAME POROU S27 NEW PATCH GROUP NUMBER 2 >MODEL DATA >>MODIEY PATCH >>PHYSICAL PROPERTTES OLD PATCH NAME OUTLET2/ NEW PATCH GROUP NUMBER 2 >>POROUS REGION PARAMETERS PATCH GROUP NUMBER 1 >> MODEL BOUNDARY COND工T工ONS VOLUME POROSITY 0. 4 >>MASS FLOW BOUNDARIES >>POROUS REGION PARAMETERS >FLU PATCH GROUP NUMBER 2 FLUXES 0.30.7 VOLUME POROSITY 0.5 FRACTIONAL MASS FLOW SPECIFIED >>SOURCES PATCH NAME POROU S2 ENTHALPY 200.0 PER UNIT VOLUME CFX-4 CFX-4.3V4.3.1H Introductory Training (Dec 1999)
CFX-4 Introductory Training (Dec 1999) 7-8 CFX-4.3 V4.3.1H Referring to Patches Examples: - Mass flow boundaries >>MODEL TOPOLOGY >>MODIFY PATCH OLD PATCH NAME ‘OUTLET2’ NEW PATCH GROUP NUMBER 2 ... >>MODEL BOUNDARY CONDITIONS >>MASS FLOW BOUNDARIES >>FLUX FLUXES 0.3 0.7 FRACTIONAL MASS FLOW SPECIFIED ... - Porous regions >>MODEL TOPOLOGY >>MODIFY PATCH OLD PATCH NAME ‘POROUS2’ NEW PATCH GROUP NUMBER 2 ... >>MODEL DATA >>PHYSICAL PROPERTIES >>POROUS REGION PARAMETERS PATCH GROUP NUMBER 1 VOLUME POROSITY 0.4 >>POROUS REGION PARAMETERS PATCH GROUP NUMBER 2 VOLUME POROSITY 0.5 ... >>SOURCES PATCH NAME ‘POROUS2’ ENTHALPY 200.0 PER UNIT VOLUME
AEATECHNOLoGY ENGINEERING SOFTWAR CFX-Setup a command file can be created edited by Using CFX-Setup Sing an editor. Exit CUMHAND FILE HAs HEEN REAn Done S)cFx4 >hoDEL TOPOLoGY HoDCL DATA >SoL VER DATA S>moDn. DOUNDARY CONDITIONs SSOUTPUT OPT TONS >sToe CFX-4 CFX-4.3V4.3.1H Introductory Training (Dec 1999)
CFX-4 Introductory Training (Dec 1999) 7-9 CFX-4.3 V4.3.1H CFX-Setup A command file can be created & edited by • Using CFX-Setup • Using an editor
AEATECHNOLoGY ENGINEERING SOFTWAR CFX-Setup CFX-Setup is accessed within the Environment 3 levels to tailor the complexity of the program to your experience and need Beginner(default), Intermediate, Advanced Files can be read in& displayed Command file, geometry file Select Active Keywords to toggle on or off keywords Order of working From left to right, relevant options become available later on 7-10 CFX-4 CFX-4.3V4.3.1H Introductory Training (Dec 1999)
CFX-4 Introductory Training (Dec 1999) 7-10 CFX-4.3 V4.3.1H CFX-Setup CFX-Setup is accessed within the Environment. 3 levels to tailor the complexity of the program to your experience and need - Beginner (default), Intermediate, Advanced. Files can be read in & displayed - Command file, geometry file. Select Active Keywords to toggle on or off keywords. Order of working - From left to right, relevant options become available later on
