udf宏的功能

2.3. Model-Specific DEFINE Macros

The DEFINE macros presented in this section are used to set parameters for a particular model in ANSYS Fluent. Table 2.2: Quick Reference Guide for Model-Specific DEFINE Functions – Table 2.6: Quick Reference Guide for Model-Specific DEFINE Functions MULTIPHASE ONLY provides a quick reference guide to the DEFINE macros, the functions they are used to define, and the dialog boxes where they are activated in ANSYS Fluent. Definitions of each DEFINE macro are listed in udf.h. For your convenience, they are listed in Appendix B.

DEFINE_ANISOTROPIC_CONDUCTIVITY

DEFINE_CHEM_STEP

DEFINE_CPHI

DEFINE_DIFFUSIVITY

DEFINE_DOM_DIFFUSE_REFLECTIVITY

DEFINE_DOM_SOURCE

DEFINE_DOM_SPECULAR_REFLECTIVITY

DEFINE_ECFM_SOURCE

DEFINE_ECFM_SPARK_SOURCE

DEFINE_EC_RATE

DEFINE_EMISSIVITY_WEIGHTING_FACTOR

DEFINE_FLAMELET_PARAMETERS

DEFINE_ZONE_MOTION

DEFINE_GRAY_BAND_ABS_COEFF

DEFINE_HEAT_FLUX

DEFINE_IGNITE_SOURCE

DEFINE_NET_REACTION_RATE

DEFINE_NOX_RATE

DEFINE_PDF_TABLE

DEFINE_PR_RATE

DEFINE_PRANDTL UDFs

DEFINE_PROFILE

DEFINE_PROPERTY UDFs

DEFINE_REACTING_CHANNEL_BC

DEFINE_REACTING_CHANNEL_SOLVER

DEFINE_SBES_BF

DEFINE_SCAT_PHASE_FUNC

DEFINE_SOLAR_INTENSITY

DEFINE_SOLIDIFICATION_PARAMS

DEFINE_SOOT_MASS_RATES

DEFINE_SOOT_NUCLEATION_RATES

DEFINE_SOOT_OXIDATION_RATE

DEFINE_SOOT_PRECURSOR

DEFINE_SOURCE

DEFINE_SOX_RATE

DEFINE_SPARK_GEOM (R14.5 spark model)

DEFINE_SPECIFIC_HEAT

DEFINE_SR_RATE

DEFINE_THICKENED_FLAME_MODEL

DEFINE_TRANS UDFs

DEFINE_TRANSIENT_PROFILE

DEFINE_TURB_PREMIX_SOURCE

DEFINE_TURB_SCHMIDT UDF

DEFINE_TURBULENT_VISCOSITY

DEFINE_VR_RATE

DEFINE_WALL_FUNCTIONS

DEFINE_WSGGM_ABS_COEFF

Table 2.2: Quick Reference Guide for Model-Specific DEFINE Functions

Function DEFINE Macro Dialog Box Activated In anisotropic thermal conductivity DEFINE_ANISOTROPIC_CONDUCTIVITY Create/Edit Materials

mixing constant DEFINE_CPHI User-Defined Function Hooks homogeneous net mass reaction rate for

DEFINE_CHEM_STEP User-Defined Function Hooks

all species, integrated over a time step

species mass or UDS diffusivity DEFINE_DIFFUSIVITY Create/Edit Materials diffusive reflectivity for discrete

DEFINE_DOM_DIFFUSE_REFLECTIVITY User-Defined Function Hooks ordinates (DO) model

source for DO model DEFINE_DOM_SOURCE User-Defined Function Hooks specular reflectivity for DO model DEFINE_DOM_SPECULAR_REFLECTIVITY User-Defined Function Hooks ECFM source DEFINE_ECFM_SOURCE User-Defined Function Hooks ECFM spark source DEFINE_ECFM_SPARK_SOURCE Set Spark Ignition electrochemical reaction rate DEFINE_EC_RATE User-Defined Function Hooks emissivity weighting factor for the

DEFINE_EMISSIVITY_WEIGHTING_FACTOR User-Defined Function Hooks radiative transfer equation of the non-

gray P-1 model and the non-gray DO

model

variation of scalar dissipation, mean

DEFINE_FLAMELET_PARAMETERS Species Model

mixture fraction grid, and mean

progress variable grid for flamelet

generation

cell zone motion components in a

DEFINE_ZONE_MOTION cell zone condition

moving reference frame or moving

mesh simulation

gray band absorption coefficient for DO

DEFINE_GRAY_BAND_ABS_COEFF Create/Edit Materials model

weighted-sum-of-gray-gases model

DEFINE_WSGGM_ABS_COEFF Create/Edit Materials (WSGGM) absorption coefficient

soot absorption coefficient DEFINE_WSGGM_ABS_COEFF Create/Edit Materials

wall heat flux DEFINE_HEAT_FLUX User-Defined Function Hooks ignition time source DEFINE_IGNITE_SOURCE User-Defined Function Hooks homogeneous net mass reaction rate for

DEFINE_NET_REACTION_RATE User-Defined Function Hooks all species

Table 2.3: Quick Reference Guide for Model-Specific DEFINE Functions–Continued

Function DEFINE Macro Dialog Box Activated In NOx formation rates (for Thermal NOx,

DEFINE_NOX_RATE NOx Model

Prompt NOx, Fuel NOx, and O

Pathways) and upper limit for

temperature PDF

PDF lookup table DEFINE_PDF_TABLE User-Defined Function Hooks particle surface reaction rate DEFINE_PR_RATE User-Defined Function Hooks Prandtl numbers DEFINE_PRANDTL Viscous Model

species mass fraction DEFINE_PROFILE boundary condition (for example,

Velocity Inlet)

velocity at a boundary DEFINE_PROFILE boundary condition

pressure at a boundary DEFINE_PROFILE boundary condition temperature at a boundary DEFINE_PROFILE boundary condition

mass flux at a boundary DEFINE_PROFILE boundary condition

target mass flow rate for pressure outlet DEFINE_PROFILE Pressure Outlet

turbulence kinetic energy DEFINE_PROFILE boundary condition (for example,

Velocity Inlet)

turbulence dissipation rate DEFINE_PROFILE boundary condition

specific dissipation rate DEFINE_PROFILE boundary condition

porosity DEFINE_PROFILE boundary condition

viscous resistance DEFINE_PROFILE boundary condition

inertial resistance DEFINE_PROFILE boundary condition

porous resistance direction vector DEFINE_PROFILE boundary condition

user-defined scalar boundary value DEFINE_PROFILE boundary condition

internal emissivity DEFINE_PROFILE boundary condition