DEBUG number [mode] 
This keyword is intended for use during code development and testing. The various debug options and modes are described below. For each option, the subroutines referencing that option are listed in parentheses. If mode is not described for a given debug option, it should be set to 1 to activate that option. If mode is omitted, a default value of 1 is used.
Unless noted otherwise, these options only apply to unstructured grids.
number  Description  

1  Generate grid and solution files for
postprocessing by Ensight.
(evrzon, US_hdzwrt)
 
*2* 
Obsolete. Replaced with the
WRITE WALLDISTANCE
keyword.
Original description was as follows:
Write distance to the nearest wall for
each grid point into the .cfl file as the variable
WallD.
This option applies to both structured and unstructured grids.
(InitWallDst, walldfil)
 
*3* 
Obsolete. Replaced with the
RESIDUAL_OUTPUT
keyword.
Original description was as follows:
Residual computation.
(lpschmu, TURB_goldbergUS, TURB_shihkeUS, TURB_spalartUS, TURB_sstUS)
 
4  With the HLLE
differencing scheme, replace the antidiffusive terms with
Laxlike dissipation reduction.
The size of the dissipation reduction term is scaled by
mode / 100.
(hlle, US_HLLE, US_HLLEpt, US_HLLERL)
 
7  Write the zonal maximum and minimum values
of the dependent variables, and the maximum and minimum vertex
value of the pressure, into the .lis file.
(US_Qcell2Qvrtx)
 
8  Split the edge data
(.cge) file into mode files.
(edgopn)
 
9  Write extra arrays
containing cell volume, cell centroid coordinates, face center
coordinates, and cell connectivity into the .cge file for
debugging purposes.
(edgopn, prerdinpt, US_PreUnstructRead, US_PreUnstructWrite)
 
10  Write detailed grid information and wall
distance into the .lis file.
For wall distances, this option applies to both structured and
unstructured grids.
(GlobalWallDist, MkGlblWallLst, US_mklines US_PreUnstructWrite,
US_StencilFill, US_ZnlWallDist)
 
11  Multiplying factor
for viscousdiffusion Jacobian.
If DEBUG 11 is not used, a value of 4.0 is used in
TURB_goldbergfluxUS, and 2.0*Dissip_Jcb in
US_FluxJcbnDiss, where Dissip_Jcb is the
Jacobian dissipation parameter set using the
LAX DAMPING keyword.
(TURB_goldbergfluxUS, US_FluxJcbnDiss)
 
*12* 
Removed.
Original description was as follows:
Maximum ratio of
production to destruction allowed in Goldberg turbulence model.
(TURB_goldbergsrcUS)
 
*13* 
Removed.
Original description was as follows:
Maximum ratio of
destruction to production allowed in Goldberg turbulence model.
(TURB_goldbergsrcUS)
 
14  When updating
turbulence model values, write maximum turbulent viscosity to
.lis file.
(TURB_UpdateGoldberg, TURB_UpdateSA)
 
15  Not applicable in WindUS.
(NSzsolv, US_unstrpstinp)
 
16  For multispecies
flows, write thermodynamic data table into the file
Thermo_Tables.
This option applies to both structured and unstructured grids.
(chpstin1, propin)
 
17  When writing flow
solution to .cfl file, for vertices at coupled surfaces
with multiple boundary conditions (e.g., at corners), make the
"coupled" boundary condition the lowest priority.
(US_Qcell2Qvrtx)
 
18  Neglect the diffusion
Jacobian from the implicit operator in the unstructured
SpalartAllmaras turbulence model.
(TURB_diffuseSA)
 
*19* 
Obsolete. Replaced with the
FIXER THRESHOLD
keyword.
Original description was as follows:
Threshold the solution
values when a cell exceeds the specified min/max rather than
performing an average with the surrounding cells. See the
FIXER keyword.
(US_AverageQ)
 
20  Not applicable in WindUS.
(GRD_UpdateMet)
 
22  Not applicable in WindUS.
(loadqbc, lpmgu, stagepstinp, US_unstrpstinp)
 
23  For the Rusanov
(Lax) scheme, explicitly set the damping factor for strong shocks
to 0.01 × mode.
The default is to set this damping factor to 0.5 (i.e., equivalent
to mode = 50).
(US_Lax, US_LaxRL)
 
*24* 
Removed.
Original description was as follows:
The convergence
criterion (see the CONVERGE LOAD
keyword) is set to 1 / mode.
The default convergence criterion is 0.01.
(LoadCnvrg)
 
25  Prevents
an error exit when both CFL#
AUTOMATIC and a time step in seconds are specified in
the same zone.
Note though that this shouldn't happen, unless both CFL#
AUTOMATIC and CFL MODE
1 or 2 are erroneously used in the same zone.
(pstinp)
 
27  Not applicable in WindUS.
(US_unstrpstinp)
 
28  Not applicable in WindUS.
(US_unstrpstinp)
 
30  Output lines created
for the IMPLICIT
GaussSeidel line solver to a FieldView "particle path" file
for visualization. This includes all the lines in the grid
(i.e. those generated by
cfpart
and those generated internally in the solver).
(US_mklines)
 
31  Don't stop execution
when errors are found in cell volumes or face normals.
(US_CheckPreInfo)
 
32  Minimum line length
to be used when creating lines for line GaussSeidel solver.
The default value is 10.
(US_mklines)
 
34  Alters how the local
time step is computed from the specified CFL number. When activated
a constant time step is used along "lines" of an unstructured grid.
(US_TimeStep)
For a description of what lines are and how they are used, see the IMPLICIT UGAUSS LINE option.  
35  Use an alternate
procedure for computing the friction velocity
u_{τ} for WALL FUNCTION
boundary conditions.
Note also that if mode<0, the near wall damping terms in the SpalartAllmaras turbulence model will be disabled. This DEBUG option may only be used for a perfect gas. (TURB_sasrcUS, US_utau)  
38  When implicit
boundary conditions are being used (see
IMPLICIT BOUNDARY), use
explicit boundary conditions at outflow boundaries.
(US_rlupw)
 
39  Compute distance
to the nearest wall for each grid point the "old" way (i.e., on
a zonal basis).
This option applies to both structured and unstructured grids.
(MkGlblWallLst, walldfil)
 
40 
Activate the fictitious gas law Mach scaling as an alternative
to using FIXER.
(gas1, gas4)
 
*41* 
Obsolete. Replaced with the
IMPLICIT BOUNDARY ON
keyword.
Original description was as follows:
When implicit boundary conditions are being used (see
IMPLICIT BOUNDARY), also
treat coupled boundaries implicitly.
Requires a parallel run with as many processors as zones, and with
direct communication between workers (see the .mpc file
communication
command).
(US_bcalloc, US_implCpl, US_ImplStencil, US_InitDq,
US_lhsvis, US_rlupw, US_TransferDq, wbnd2)
 
*42* 
Obsolete. Became the default setting in version 3.138.
Original description was as follows:
Solve the NavierStokes and turbulence equation sets
concurrently in one pass even though they are not coupled sets.
This option applies to unstructured grids only.
(lpgrp, lpmgu, lpns, lpschmu, setzon, TURB_sstUS, TURB_goldbergUS,
TURB_shihkeUS, TURB_spalartUS, TURB_realkeUS, US_DqLimit)
 
43  Applies the
slope limiter (see TVD)
to the gradients used in the viscous operator (in addition to the
required application in the inviscid flux). Since the form of the
viscous operator has been changed to something less sensitive,
this option may be removed in the future.
(US_SlopeLimitVenkat)
 
45  Not applicable in WindUS.
(bcstdrd)
 
*46* 
Obsolete. Replaced with the
RHS VISCOUS
keyword.
Original description was as follows:
Viscous flux correction method.
(TURB_diffuseSST, US_FaceConCA, US_FaceConFBnd, US_FaceGradGG)
The default is no correction if GRADIENTS LEAST_SQUARES was specified, and the original correction method otherwise.  
47  Not applicable in WindUS.
(lpschmu, US_TimeStep)
 
48  A solution limiter,
similar to that in the CFL3D code, which adjusts all of the flow
variables (not just density and pressure) to maintain realizability.
This option has seen limited success beyond the default mode.
(US_DqLimit, US_GS_FullStore, US_LGS_FullStore, US_UpdateNS)
 
49  Use full
linearization of turbulence model.
In addition, if mode < 0, and the coefficient matrix
is not diagonally dominant, stability will be enhanced by
multiplying the relevant diagonal terms by 1.05.
(TURB_lhsdt, TURB_sasrcUS)
 
50  Not applicable in WindUS.
(US_rhsvis)
 
51  For
GRADIENTS LEAST_SQUARES,
activate least squares based on face neighbors.
(US_LSstencil)
 
53  For the Roe scheme,
get interface flux using same routines as in structured solver.
(This option is currently disabled, and will cause an abort
if used in conjunction with RHS
ROE.)
(US_rhsupw, US_rlupw)
 
54 
Used to alter the viscous wall boundary condition used with the
SST TURBULENCE MODEL.
The objective of this option is to reduce the model's nearwall
grid sensitivity, but thus far only a marginal improvement has
been obtained.
(TURB_sstboundUS, TURB_SSTf3, TURB_SSTfixK, TURB_SSTmut,
TURB_sstsrcUS, TURB_sstUS, US_tdbcg)
In the description that follows, note that the analytic smoothwall asymptotic boundary condition as the wall normal distance, s→0 is given by: ρω→6μ_{L}/(β(Re*s)^{2}). The quantity ds is the distance to the first point off the wall, and all equations are written in terms of nondimensional variables.
This debug option simultaneously controls whether the eddy viscosity is computed using the strain rate rather than vorticity, which is not frame invariant.
 
55 
Uses the turbulent shear stress tensor instead of vorticity in
the production term of the SST
TURBULENCE MODEL
on unstructured grids.
(TURB_sstsrcUS)
 
56  Not applicable in WindUS.
 
57  Freeze the
unstructured grid slope limiter after mode iterations.
(US_SlopeLimit)
 
59 
To improve convergence, bleed boundaries in unstructured grid zones
are normally handled explicitly for the first 100 cycles, then
included as part of the implicit operator thereafter.
Using this debug option disables the implicit treatment of
the bleed boundaries.
(US_lhswall)
 
60 
Applies the viscous operator to a known solution for the purpose
of assessing accuracy of the unstructured solver via the method
of manufactured solutions.
(lpschmu, US_rhs_solve)
 
61 
Write the unstructured solver linear system (subiteration)
convergence to the list output (*.lis) file.
(TURB_ILU, TURB_pntGS, US_GS_FullStore, US_ILU_FullStore)
 
62  Not applicable in WindUS.
 
63  Not applicable in WindUS.
 
64 
Modifies how the local min/max in the solution is
determined for the purpose of
TVD VENKAT
slopelimiting in the unstructured solver.
(US_SlopeLimitVenkat)
 
65  Write log of memory
allocation/deallocation to the file memdebug.lis.
This option applies to both structured and unstructured grids.
(MemDebug, prerdinpt, solver_main)
 
66 
Used to test the unstructured solver gradient calculator.
(lpschmu, US_SetGradQLS)
 
67 
Print cell data for testing the unstructured solver.
(lpschmu)
 
68  Turn off the
inviscid terms for the purpose of testing the viscous operator.
This option applies to unstructured grids.
(US_rhs_solve)
 
69 
For the unstructured solver, generate lines based on
Jacobian weight.
(TURB_implUS, TURB_linearRes, US_impl)
 
70 
For the unstructured solver, compute an L2norm of the
difference between left and right states over all cell
faces for the NavierStokes equation set. Print this
norm to the list output (.lis) file.
(US_rhs_solve)
 
71 
Not applicable in WindUS.
 
72 
In the unstructured solver, convert Roe flux to advection.
(US_RoeRL)
 
73 
In the unstructured solver, neglect the roll source terms.
(US_add_rotate)
 
74 
In the unstructured solver, use the exact supersonic
corner flow to test the numerics.
(lpschmu, sins, US_bcfil, US_exact_corner_soln)
 
75 
In the unstructured solver, use a prescribed pressure
profile to test the numerics
(GRD_zsolv)
 
76 
Bitmap used to activate the ADF memory buffer
for common files.
(openf, psinpt)
 
77 
Bitmap that controls how the boundary flux in the
unstructured solver will be computed.
If the flags are 0, then the boundary flux is imposed by the
boundary condition value. If it is nonzero, then the flux is
computed using the chosen interior scheme with the boundary
value and cell value forming the left and right states.
(US_lhswall, US_rlupw)
 
78 
Use the older (and significantly slower) octree test
for computing wall distance.
(GlobalWallDist)
 
80 
Compute the wall distance
by solving a partial differential equation.
Only for evaluation purposes with the unstructured solver.
(axturb, evrzon, evsolv)
 
81 
Modify the behavior of unstructured grid cells that violate the
GRID LIMITER ANGLE setting.
(US_FaceGradGG, US_rhsvisFace, US_SetGradQ)
 
82 
Activate the DaclesMariani curvature correction to the
SpalartAllmaras
TURBULENCE MODEL.
This correction is a simpler alternative to the standard
rotation term.
It reduces the eddy viscosity in regions where vorticity
exceeds strain rate, such as in vortex core regions where
pure rotation should not produce turbulence.
In thin shear layers, where vorticity and strain are very
close, this correction should have minimal effect.
(TURB_sasrcUS)
 
83 
Apply the crossdiffusion limiter of Langtry to the
unstructured grid SST
TURBULENCE MODEL.
For evaluation by developers only.
(TURB_sstboundUS, TURB_sstsrcUS)
 
84 
Use a secondorder advective flux with the unstructured
SST TURBULENCE MODEL.
(TURB_sstfluxUS)
 
85  Not applicable in WindUS.
 
86 
Revert to the old cell to vertex calculation for unstructured
solutions.
This refers to the creation of the cfl (nodebased solution)
from the tda (cellbased solution). Many improvements have
been made to which variables are used and which boundaries
have preference, in order to create "better looking" cfl
files.
(US_Qcell2Qvrtx)
 
87  Not applicable in WindUS.
 
89 
Limit the maximum orthogonal angle deviation for
unstructured grid wall cells.
The mode value is the maximum allowed angle (in degrees)
between the facecell center line and face normal.
When this limit is exceeded, the facecenter is moved to lie
on the facenormal vector that passes through the cellcenter.
(evrzon)
 
90 
Not applicable in WindUS.
 
107 
Compute the cell centroid for unstructured grids from the
average of the nodal coordinates.
 
125  Not applicable in WindUS.
 
200 
This option exercises the LiuVinokur equilibrium air
CHEMISTRY
tables, generates some Tecplot files, and then quits.
It is used to compare the internal tables to the plots
published by Liu & Vinokur and allows one to look at the
behavior when conditions depart the tables.
(liu3, solver_main, lvtest)

Last updated 1 Apr 2016