This chapter lists all the GENTRA-PIL variables, with their type, default value and, if appropriate, units and valid range of values (the latter enclosed in angle brackets <>). See Chapter 3 for background information on the GENTRA-PIL.
In addition to being used in the Q1 file, all these variables are also available in the FORTRAN subroutine GENIUS through the COMMON blocks INCLUDEd in TRACMN.
Information on each of these variables is also available through the GENTRA Menu. See Section 2.5.
B.2.1 GENTRA Group 1: Particle physics
Variable |
Type |
Meaning |
GBUOYA |
BOOL |
Switch for buoyancy effect |
GCPCON |
REAL |
Cp of continuous phase |
GCPLIQ |
REAL |
Cp of particle or Cp of liquid for solid/melt particle |
GCPSOL |
REAL |
Cp of solid |
GCPVAP |
REAL |
Cp of Vapour |
GDRAG |
REAL |
Drag coefficient |
GGRAX |
REAL |
X-component of gravity vector |
GGRAY |
REAL |
Y-component of gravity vector |
GGRAZ |
REAL |
Z-component of gravity vector |
GHLIQD |
REAL |
Particle liquid saturation enthalpy |
GKONC |
REAL |
Thermal conduct. of the cont. phase without vapour |
GKONV |
REAL |
Thermal conductivity of vapour |
GLAGTS |
INT. |
Time-steps/cell |
GLATVP |
REAL |
Latent heat of evaporation |
GLHEAS |
REAL |
Latent heat of solidification |
GLIQST |
REAL |
Liquidus temperature |
GMWCON |
REAL |
Mol. Weight of continuous phase |
GMWVAP |
REAL |
Mol. Weight of particle |
GNUSS |
REAL |
Nusselt number |
GPTYPE |
INT. |
Particle type |
GSOLIN |
REAL |
Index for solid-fraction formula |
GSOLST |
REAL |
Solidus temperature |
GSTOCH |
BOOL |
Switch of stochastic turbulence model |
GSTPRE |
REAL |
Saturation pressure of vapour |
GSURPR |
BOOL |
Switch for pressure gradient effects |
GVAPST |
REAL |
Saturation temperature of vapour |
B.2.2 GENTRA Group 2: Boundary conditions
Variable |
Type |
Meaning |
GINFIL |
CHAR |
Name of the file for particle inlet condition |
GINSYS |
INT. |
Co-ordinate system for particle inlet condition |
GPOROS |
REAL |
Threshold for obstacle porosity |
GWALLC |
NT. |
Wall type |
GWREST |
REAL |
Restitution coefficient of wall |
B.2.3 GENTRA Group 3: Numerical controls
Variable |
Type |
Meaning |
GDTMAX |
REAL |
Maximum Lagrangian time-step size |
GDTRCT |
REAL |
Minimum particle diameter allowed |
GLNRLX |
REAL |
Relaxation factor for sources of continuous phase |
GRTFRC |
REAL |
Time step size multiplier |
GSTEMX |
INT. |
Maximum number of time-steps |
GSWEP1 |
INT. |
1st GENTRA sweep |
GSWEPF |
INT. |
Sweep frequency for GENTRA |
GTIMMX |
REAL |
Flight timeout |
B.2.4 GENTRA Group 4: Output controls
Name |
Type |
Meaning |
GH1STC |
CHAR |
ID of individual history file |
GHFILE |
CHAR |
Name of global history file |
GOUTFR |
INT. |
Frequency (time-steps) for output |
GRESTI |
INT. |
Cell-residence-time calculation |
GRSFIL |
CHAR |
Name of particle restart file |
GSWOUT |
INT. |
Frequency of writing output to screen |
GT1STC |
CHAR |
ID of individual trajectory file |
NGWEND |
INT. |
Last trajectory to write |
NGWINT |
INT. |
Interval of writing trajectories |
NGWSTR |
INT. |
First trajectory to write |