AFLR43 Overview
AFLR43 is an unstructured 3D surface and volume mesh generation code. It combines AFLR4 and AFLR3 to create an integrated geometry definition to volume mesh capability.
The following is a simple summary of usage with options. For more information, see Usage Summary for a summary of options and default values and Option Details for a detailed description of all options.
Run AFLR43
aflr43 [aflr4_param_options] [-AFLR3 aflr3_param_options]
AFLR4 Param Options
PARAMETER NAME DESCRIPTION
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PROGRAM CONTROL & I/O PARAMETERS
-File_Status_Monitor : Turn on file status monitor.
-Memory_Monitor : Turn on memory monitor.
-Memory_Monitor2 : Turn on memory monitor.
-build : List program version build number.
-h : List summary of input parameters.
-h_all : List summary of all input parameters.
-h_io : List summary of file I/O parameters.
-help : List documentation of input parameters.
-help_all : List documentation of all input parameters.
-help_io : List documentation of file I/O parameters.
-out : Generate an output file.
-log : Generate an output file.
-out_a : Append an output file.
-log_a : Append an output file.
-outf : Send output to a file only.
-logf : Send output to a file only.
-outf_a : Append output to a file only.
-logf_a : Append output to a file only.
-ver : List program version number.
-version : List program version information.
Help_Flag : List documentation of input parameters.
Help_UG_IO_Flag : List documentation of file I/O parameters.
Output_File_Flag : Output file flag.
-v : Use executable in specified directory.
Input_File_Name : Input CAD file case name or file name or input CAD file name.
-i -cad -igrid -case : Input CAD file case name or file name or input CAD file name.
Output_Grid_File_Name : Output grid file name or suffix.
-o -ogrid : Output grid file name or suffix.
TMP_File_Dir : Temporary file directory.
-tmp : Temporary file directory.
FLAG PARAMETERS (OFTEN USED)
-er_all : Use global edge mesh spacing refinement.
-np : Run in parallel processing mode using np processes.
-quad : Generate a mixed quad/tria-face grid.
OPTION PARAMETERS (OFTEN USED)
BL_IDs : List of IDs for BL Generating Solid surfaces.
-bl_ids : List of IDs for BL Generating Solid surfaces.
BL_Int_IDs : List of IDs for BL Intersecting surfaces.
-bl_ints -bl_int_ids -ints -int_ids : List of IDs for BL Intersecting surfaces.
FF_IDs : List of IDs to for FarField surfaces.
-ffs -ff_ids : List of IDs to for FarField surfaces.
Std_IDs : List of IDs to for Solid surfaces.
-stds -std_ids : List of IDs to for Solid surfaces.
Trnsp_BL_IDs : List of IDs for BL Generating Transparent surfaces.
-trnsp_bl_ids : List of IDs for BL Generating Transparent surfaces.
Trnsp_BL_Int_IDs : List of IDs for BL Intersecting Transparent surfaces.
-trnsp_bl_int_ids : List of IDs for BL Intersecting Transparent surfaces.
Trnsp_IDs : List of IDs for Transparent surfaces.
-trnsp_ids : List of IDs for Transparent surfaces.
Trnsp_Intl_BL_IDs : List of IDs for BL Generating Internal Transparent surfaces.
-trnsp_intl_bl_ids : List of IDs for BL Generating Internal Transparent surfaces.
Trnsp_Intl_IDs : List of IDs for Internal Transparent surfaces.
-trnsp_intl_ids : List of IDs for Internal Transparent surfaces.
Trnsp_Src_IDs : List of IDs for Transparent Source surfaces.
-trnsp_src_ids : List of IDs for Transparent Source surfaces.
auto_set_ff_bc : Automatic farfield grid BC flag.
mer_all : Global edge mesh spacing refinement weight flag.
nproc : Number of processes to use.
parallel_mode : Parallel processing mode flag.
NUMERIC PARAMETERS (OFTEN USED)
curv_angle : Curvature spacing angle in degrees.
ref_len : Reference length for components/bodies.
FLAG PARAMETERS (SOMETIMES USED)
-add_ff : Add a box-shaped farfield definition to configuration.
-add_ff2 : Add a rectangular-box-shaped farfield definition to configuration.
-ext : Use external sizing routine.
-met2 : Use metric space with advancing-front point placement.
-met3 : Use metric space with advancing-point point placement.
OPTION PARAMETERS (SOMETIMES USED)
BC_IDs : List of IDs to set grid BC parameters.
bc_ids : List of IDs to set grid BC parameters.
Grid_BC_Flag : List of grid BC flags to set.
bc_list : List of grid BC flags to set.
add_ff_geom : Farfield add-on flag.
cad_param_reset : CAD parameter reset flag.
cmp_ids : List of surface IDs to set as components.
cmp_list : List of component identifiers for each component/body specified.
erw_ids : List of surface IDs to set edge mesh spacing refinement weight.
esf_ids : List of edge IDs to set edge mesh spacing scale factor.
malign : Metric alignment flag.
merge_ids : List of discrete geometry definition surface IDs to to merge.
merge_sets : List of the number of IDs for each merge set.
min_ncell : Minimum number of cells between two components/bodies.
sf_ids : List of surface IDs to set surface mesh spacing scale factor.
NUMERIC PARAMETERS (SOMETIMES USED)
BL_thickness : Boundary layer thickness for proximity checking.
-bl_del : Boundary layer thickness for proximity checking.
Re_l : Reynolds Number for estimating BL thickness,
-Re : Reynolds Number for estimating BL thickness,
erw_all : Global edge mesh spacing refinement weight.
erw_list : List of edge mesh spacing refinement weights.
esf_list : List of edge mesh spacing scale factors.
ff_cdfr : Farfield growth rate for field point spacing.
ff_size : Farfield size factor.
max_scale : Relative maximum spacing.
rel_max_sp : Relative maximum spacing.
sf_global : Global surface mesh spacing scale factor.
sf_all : Global surface mesh spacing scale factor.
sf_list : List of surface mesh spacing scale factors.
FLAG PARAMETERS (SELDOM USED)
-no_prox : Disable proximity checking.
OPTION PARAMETERS (SELDOM USED)
Rec_IDs : List of IDs to reset Reconnection flag.
-rec_ids : List of IDs to reset Reconnection flag.
auto_mode : Auto-spacing mode flag.
create_tess : Output CAD tess data creation flag,
geom_mmsg : Geometry definition output flag,
mier4 : Isolated edge refinement flag.
mier_ids : List of surface IDs to set isolated edge refinement flag.
mier_list : List of isolated edge refinement flags.
mw_cad_def : CAD definition file write flag,
quad_ids : List of surface IDs for quad-face combination.
surf_gen_mmsg : Surface mesh generation output flag,
NUMERIC PARAMETERS (SELDOM USED)
er_lim : Edge mesh spacing refinement limit.
FLAG PARAMETERS (RARELY USED)
-grow : Use specified growth in element size.
-grow1 : Use moderate growth in element size.
-grow2 : Use high growth in element size.
-grow3 : Use very high growth in element size.
-open : Input configuration is open.
-skin : Input configuration has a structural skin topology.
OPTION PARAMETERS (RARELY USED)
Message_Flag : Message flag.
mmsg : Message flag.
Rec_Flag : List of reconnection flags to reset.
high_order_eval : Discrete geometry high-order evaluation flag.
keep_bodies : List of input body IDs to keep.
m_arearchk : Output area ratio check flag.
mclosed : Input configuration open/closed flag.
mdf : Distribution function flag.
melem : Maximum number of elements.
min_nseg : Minimum number of segments on an individual curve.
mpp : Point placement flag.
mqchkb : Boundary surface quality measure information output flag.
mquad : Quad face combination flag.
n_shmem_buffer : Shared memory buffer size.
rm_bodies : List of input surface IDs to remove.
skin_mode : Structural skin topology mode flag.
NUMERIC PARAMETERS (RARELY USED)
ang_qbmax : Output face angle check maximum angle limit.
ang_qbmax2 : Output face angle check usable maximum angle limit.
ang_qbmin : Output face angle check minimum angle limit.
angdbe : Discontinuous boundary edge angle.
angerw1 : Minimum discontinuous edge angle.
angerw2 : Maximum discontinuous edge angle.
angquad1 : Maximum aligned quad face angle.
angquad2 : Maximum non-aligned quad face angle.
angquad3 : Final maximum quad face angle.
arear_qbmin : Output area ratio check quality limit.
arear_qbmin2 : Output area ratio check quality limit.
cdfr : Maximum geometric growth rate.
gtol : Relative glue tolerance.
length_ratio : Curvature length ratio threshold.
prox_min_scale : Relative proximity minimum spacing.
rel_prox_min_sp : Relative proximity minimum spacing.
qarear_qmin : Output quality function Q check quality limit.
qarear_qmin2 : Output quality function Q check usable limit.
AFLR3 Param Options
PARAMETER NAME DESCRIPTION
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PROGRAM CONTROL & I/O PARAMETERS
Input_File_Name : Input CAD file case name or file name or input CAD file name.
-i -cad -igrid -case : Input CAD file case name or file name or input CAD file name.
Output_Grid_File_Name : Output grid file name or suffix.
-o -ogrid : Output grid file name or suffix.
TMP_File_Dir : Temporary file directory.
-tmp : Temporary file directory.
FLAG PARAMETERS (OFTEN USED)
-bcheck : Check boundary surface mesh.
-bl : Generate a BL grid suitable for CFD.
-blc : Generate a BL grid suitable for CFD and create prism elements.
-blc2 : Generate a BL grid suitable for CFD and create prism/split-hex elements.
-blc3 : Generate a BL grid suitable for CFD and create prism/hex elements.
-blcheck : Check BL parameters and input surface grid.
-bls : Generate a BL grid from specified surfaces.
-ice : Generate an interior core mesh with varying element size.
-ice1 : Generate an interior core mesh with uniform element size.
-snsc : Generate a SNS grid and create prismatic elements.
-snsc2 : Generate a SNS grid and create prism/split-hex elements.
-snsc3 : Generate a SNS grid and create prism/split-hex elements.
-y+ : Specify turbulent BL y+ for determining the initial spacing normal.
OPTION PARAMETERS (OFTEN USED)
BL_IDs : List of IDs for BL Generating Solid surfaces.
-bl_ids : List of IDs for BL Generating Solid surfaces.
BL_Int_IDs : List of IDs for BL Intersecting surfaces.
-bl_ints -bl_int_ids -ints -int_ids : List of IDs for BL Intersecting surfaces.
FF_IDs : List of IDs to for FarField surfaces.
-ffs -ff_ids : List of IDs to for FarField surfaces.
PS_IDs : ID pairs for periodic surfaces.
-psids : ID pairs for periodic surfaces.
Std_IDs : List of IDs to for Solid surfaces.
-stds -std_ids : List of IDs to for Solid surfaces.
Trnsp_BL_IDs : List of IDs for BL Generating Transparent surfaces.
-trnsp_bl_ids : List of IDs for BL Generating Transparent surfaces.
Trnsp_BL_Int_IDs : List of IDs for BL Intersecting Transparent surfaces.
-trnsp_bl_int_ids : List of IDs for BL Intersecting Transparent surfaces.
Trnsp_IDs : List of IDs for Transparent surfaces.
-trnsp_ids : List of IDs for Transparent surfaces.
Trnsp_Intl_BL_IDs : List of IDs for BL Generating Internal Transparent surfaces.
-trnsp_intl_bl_ids : List of IDs for BL Generating Internal Transparent surfaces.
Trnsp_Intl_IDs : List of IDs for Internal Transparent surfaces.
-trnsp_intl_ids : List of IDs for Internal Transparent surfaces.
Trnsp_Src_IDs : List of IDs for Transparent Source surfaces.
-trnsp_src_ids : List of IDs for Transparent Source surfaces.
m_ice : Interior core (ICE) mesh flag.
mblend : BL termination flag.
NUMERIC PARAMETERS (OFTEN USED)
cdfrbl : BL geometric growth rate.
-blr : BL geometric growth rate.
cdfrblm : Maximum BL geometric growth rate.
-blrm : Maximum BL geometric growth rate.
dsdef : BL initial normal spacing.
-blds : BL initial normal spacing.
refx : Reference length.
STRING PARAMETERS (OFTEN USED)
BG_Case_Name : Case name for background grid and function file names.
-ib -iback -bcase : Case name for background grid and function file names.
FLAG PARAMETERS (SOMETIMES USED)
-backgen2 : Generate a background grid and length-scale function internally.
-bldelmax : Set BL thickness equal to the maximum BL thickness.
-blpr : Protect the BL region by reducing the field spacing.
-ext : Use external sizing routine.
-met2 : Use metric space with advancing-front point placement.
-met3 : Use metric space with advancing-point point placement.
-no_back : Do not read background grid and length-scale function files.
-no_bldel : Ignore BL thickness specified.
-no_vol_id : Do not set volume element ID flag.
-no_vid : Do not set volume element ID flag.
-open : Generate an open BL region grid for a closed domain.
-open2 : Generate an open BL region grid for an open domain.
-qall : Generate volume grid quality data for all quality measures.
-qnone : Do not generate any volume grid quality data.
-qsall : Generate surface grid quality data for all quality measures.
-qsnone : Do not generate any surface grid quality data.
-revbl : Reverse BL normals for and open BL region grid with an open domain.
-sns : Generate a specified normal spacing (SNS) grid.
-snss : Set specified normal spacing distribution.
-tags : Use tags data file.
-vid1 : Set volume element region ID flag.
-vid2 : Set volume element region and BL layer ID flag.
OPTION PARAMETERS (SOMETIMES USED)
BC_IDs : List of IDs to set grid BC parameters.
bc_ids : List of IDs to set grid BC parameters.
GQ_Surf_Measure_Flag : Surface grid quality measure flag.
-qs : Surface grid quality measure flag.
GQ_Surf_Output_Flag : Surface grid quality output flag.
GQ_Vol_Measure_Flag : Volume grid quality measure flag.
-q : Volume grid quality measure flag.
GQ_Vol_Output_Flag : Volume grid quality output flag.
Grid_BC_Flag : List of grid BC flags to set.
bc_list : List of grid BC flags to set.
iblri : Number of constant spacing BL layers.
-bli : Number of constant spacing BL layers.
malign : Metric alignment flag.
mbcheck : Boundary surface mesh check flag.
mblchkv : BL element volume checking flag.
mblelc : BL element combination flag.
mmet : Metric space flag.
mmetblbl : BL blending.
mnbllim : Number of BL layers limiting flag.
mquadp : Quad-Pyramid transition flag.
msource : Source option flag.
mw_met_hist : Output flag for metric space analysis information.
nbl : Maximum BL grid layers to generate.
nbldiff : Maximum difference in BL levels.
NUMERIC PARAMETERS (SOMETIMES USED)
BL_DEL : Surface patch BL thickness.
BL_DS : Surface patch initial BL normal spacing.
PS_TMs : Periodic surface rotation matrix list.
PS_XPS0s : Periodic surface translation vector list.
SNS : Specified normal spacing distribution.
blre : Reference Reynolds number.
-Re : Reference Reynolds number.
blyp : Normalized BL normal spacing.
cdfrsns : SNS geometric growth rate.
-snsr : SNS geometric growth rate.
cdsnbl : Initial BL spacing layer limit ratio.
deldef : BL thickness.
-bldel : BL thickness.
FLAG PARAMETERS (SELDOM USED)
-blreseti : Reset initial normal spacing and/or BL thickness.
-rm_transp : Remove boundary face connectivity of standard transparent surfaces.
-sl : Generate a structured-layer grid (SL) grid.
-slc : Generate a structured-layer (SL) grid and create prismatic elements.
-slc2 : Generate a structured-layer (SL) grid and create prism/split-hex elements.
-slc3 : Generate a structured-layer (SL) grid and create prism/hex elements.
-snsi : Specify surface IDs for SNS spacing groups.
-snsids : Generate a SNS grid from specified surfaces.
OPTION PARAMETERS (SELDOM USED)
Rec_IDs : List of IDs to reset Reconnection flag.
-rec_ids : List of IDs to reset Reconnection flag.
Split_File_Format : Split data file format flag.
-split : Split data file format flag.
mbl : BL grid flag.
mblchki : BL parameter and surface check flag.
mbldelmax : BL thickness flag.
mblfinal : BL final layer flag.
mblidsmth : BL surface ID smoothing flag.
mbltype : BL type flag.
mchkvoli : Input grid volume check flag.
mdfblminm : BL isotropic length scale limiting flag.
mdflim : Distribution function limiting flag.
mdfs : Quality field sliver deletion flag.
merge_vol_mesh : Set option to merge duplicate boundary nodes and reorder.
mopen : Open BL region grid generation flag.
mqrgen : Quality improvement re-generation flag.
mrecrbf : Global boundary face reconnection flag.
mrevbl : BL normal direction flag.
msave_df : Distribution function (length scale) save flag.
msave_ieliel : Tet element neighbor connectivity save flag.
msave_met : Distribution function (length scale) save flag.
mtransp : Transparent boundary face flag.
nblsmth : BL normal vector smoothing iterations.
NUMERIC PARAMETERS (SELDOM USED)
angblqmax : Maximum BL dihedral element angle.
angblqmaxd : Maximum discontinuous BL dihedral angle.
angblqmaxd2 : Maximum convex disc. BL dihedral angle.
angqbfq : Maximum quad face angle for hexs.
cbldsm : BL sub-layer spacing multiplier.
cblmnr : Maximum normal-direction-aspect-ratio.
cblmnrmin : Minimum normal-direction-aspect-ratio.
cdf : Distribution function multiplier.
cdf2 : Distribution function multiplier #2.
cdfrsl : SL geometric growth rate.
-slr : SL geometric growth rate.
cdfs : Distribution function exclusion zone.
cdfslm : SL initial normal spacing multiplier.
-slf : SL initial normal spacing multiplier.
dcdfrbl : BL geometric growth acceleration rate.
-bldr : BL geometric growth acceleration rate.
FLAG PARAMETERS (RARELY USED)
-blauto : Automatically calculate growth rate parameters or BL thickness.
-blf : Specify fraction of laminar BL thickness for initial spacing.
-blgs : Specify surfaces to be grouped for BL streamwise variation.
-grow : Use specified growth in element size.
-grow1 : Use moderate growth in element size.
-grow2 : Use high growth in element size.
-grow3 : Use very high growth in element size.
-quadp : Use pyramids to transition from quad faces.
-sls : Generate a structured-layer (SL) grid from specified surfaces.
-transp : Do not convert source type transparent surfaces.
OPTION PARAMETERS (RARELY USED)
BG_Flag : Background grid and length-scale function file flag.
BLG_IDs : List of IDs for BL groups.
Number_of_BLs : Limit on BL layers to be generated.
Rec_Flag : List of reconnection flags to reset.
SNS_IDs : List of specified spacing groups IDs.
Set_Vol_ID_Flag : Set volume element ID flag.
Tags_Data_File_Flag : Tags data file flag.
Write_BL_Only : BL element output flag.
Write_Interior : Interior elements output flag.
m_qvrrchk : Quality function Q (based on vol/radius ratio) output flag.
m_volrchk : Output volume ratio check flag.
mblauto : BL auto-parameter flag.
mblreseti : BL initial normal spacing reset flag.
mbv_mode : Boundary normal vector mode.
mchkvol : Final element volume check flag.
mdbs : Boundary sliver deletion flag.
mdf : Distribution function flag.
mdfb : BL interface distribution function flag.
mdsblf : BL spacing thickness factor option.
mdsblfisf : Fixed BL face spacing smoothing option.
mdse : Small edge deletion flag.
melem : Maximum number of elements.
minlpp : Initial centroid node placement flag.
mlsr : Length scale ratio improvement flag.
mpp : Point placement flag.
mqchk : Element quality measure information output flag.
mqpdf : Quad-Pyramid length-scale flag.
mrec4 : 4-4 element local-Reconnection flag.
mrecbdw : Boundary curvature reconnection flag.
mrecbm : Boundary face local-reconnection flag.
mrecm : Local-Reconnection flag.
mrecqm : Quality local-reconnection flag.
mrecqmf : Final quality local-reconnection flag.
msetabl : Set adjacent surface to BL flag.
msetqp : Quad-Pyramid transition height method.
mw_bc_surf : BC surface file flag.
mw_bl_func : BL level function file flag.
mw_bl_surf : BL surface file flag.
mw_blds_func : BL spacing and normal vector file flag.
mw_blisf_surf : BLISF surface file flag.
mw_blsd_func : BL surface discontinuity function file flag.
mw_func : Write BG function file flag.
mw_func_type : Write BG function file flag.
mw_ice : ICE output debug mesh file flag.
mw_ice_surf : ICE boundary surface file flag.
nblidsmthl : BL surface ID smoothing layers.
nblsmthl : BL concave region smoothing layers.
nblsmthlisf : Fixed BL face smoothing layers.
nlsrpp : Maximum LSR point placement passes.
npsurf : Number of periodic surface pairs.
nref_max : ICE maximum number of refinement levels.
nsblm : SL normal vector smoothing layers.
NUMERIC PARAMETERS (RARELY USED)
ang_qmax : Output dihedral angle check quality limit.
ang_qmax2 : Output dihedral angle check usable limit.
angbfmax : Boundary surface face quality threshold.
angblisimx : Maximum angle between BL intersecting faces.
angblqfmax : Maximum BL interface face angle.
angblqfmax2 : Maximum BL interface face angle #2.
angdbe : Discontinuous boundary edge angle.
angqbf : Maximum planar surface angle.
angqbfmin : Minimum planar surface angle.
angslqmax : Maximum SL dihedral element angle.
angslqmaxd : Maximum discontinuous SL dihedral angle.
bldup : Normalized BL velocity increment.
cblcncvmnr : Concave maximum normal-direction-aspect-ratio.
cbldel : BL thickness slope multiplier.
cblend : Global BL termination factor.
cblisfm : Fixed surface BL check reduction factor.
cblnrchkbf : Checking normal-direction-aspect-ratio.
cblsmax : BL thickness multiplier.
cblsmaxs : BL normal smoothing multiplier.
cblsmaxsd : BL normal smoothing discontinuity multiplier.
cblsmthd : Smoothing BL thickness multiplier.
cblxlim : Minimum distance for BL variation.
cdf_gap_ic : ICE gap length scale multiplier.
cdf_ic_max : ICE max/min length scale factor.
cdf_vol : Distribution function multiplier (volume mesh).
cdffblm1 : Maximum BL edge length factor #1.
cdffblm2 : Maximum BL edge length factor #2.
cdfm : Distribution function weighting factor.
cdfn_gap_ic : ICE gap minimum closest node distance factor.
cdfn_se : Small edge factor.
cdfnbl : Nearby BL node factor.
cdfqp : Prism element height multiplier.
cdfqp_ic : ICE prism element height multiplier.
cdfr : Maximum geometric growth rate.
cdfr_gap_ic : ICE maximum geometric growth rate.
cdfrsrc : Maximum geometric source growth rate.
cdfssrc : Source distribution function exclusion zone.
csrcw : Source weight.
df_ic_max : ICE maximum length scale.
df_ic_min : ICE minimum length scale.
dfmax : Maximum distribution function.
dsmul : BL spacing multiplier.
-bldsm : BL spacing multiplier.
dx_tol : Output relative tolerance for element edge-length checking.
lsrcdf : LSRatio improvement limit factor.
lsrlimit : LSRatio improvement limit factor.
lsrpplim : LSR point placement limit factor.
qvlr_qmin : Quality function Q (based on vol/length ratio) quality limit.
qvlr_qmin2 : Quality function Q (based on vol/length ratio) usable limit.
qvrr_qmin : Quality function Q (based on vol/radius ratio) quality limit.
qvrr_qmin2 : Output quality function Q (based on vol/radius ratio) check usable limit.
vol_tol : Output relative tolerance for element volume checking.
volr_qmin : Output volume ratio check quality limit.
volr_qmin2 : Output volume ratio check quality limit.
vx : Flow X-direction vector component.
vy : Flow Y-direction vector component.
vz : Flow Z-direction vector component.