mod_global_parameters.t File Reference

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Modules
module	mod_global_parameters
	This module contains definitions of global parameters and variables and some generic functions/subroutines used in AMRVAC.

Functions/Subroutines
pure subroutine	mod_global_parameters::cross_product (ixil, ixol, a, b, axb)
	Cross product of two vectors.

Variables
double precision	mod_global_parameters::xprob
	minimum and maximum domain boundaries for each dimension
double precision	mod_global_parameters::l
double precision, dimension(^nd)	mod_global_parameters::dxlevel
	store unstretched cell size of current level
double precision, dimension(^nd)	mod_global_parameters::qstretch_baselevel
	stretch factor between cells at AMR level 1, per dimension
double precision	mod_global_parameters::xstretch
	physical extent of stretched border in symmetric stretching
double precision, dimension(:), allocatable, parameter	mod_global_parameters::d = 1|
double precision	mod_global_parameters::time_between_print
	to monitor timeintegration loop at given wall-clock time intervals
double precision	mod_global_parameters::time_bc
	accumulated wall-clock time spent on boundary conditions
double precision	mod_global_parameters::dt
	global time step
double precision	mod_global_parameters::courantpar
	The Courant (CFL) number used for the simulation.
double precision	mod_global_parameters::dtpar
	If dtpar is positive, it sets the timestep dt, otherwise courantpar is used to limit the time step based on the Courant condition.
double precision	mod_global_parameters::dtdiffpar
	For resistive MHD, the time step is also limited by the diffusion time: \( dt < dtdiffpar \times dx^2/eta \).
double precision	mod_global_parameters::global_time
	The global simulation time.
double precision	mod_global_parameters::time_init
	Start time for the simulation.
double precision	mod_global_parameters::time_max
	End time for the simulation.
double precision	mod_global_parameters::wall_time_max
	Ending wall time (in hours) for the simulation.
double precision	mod_global_parameters::dtmin
	Stop the simulation when the time step becomes smaller than this value.
double precision	mod_global_parameters::length_convert_factor
	Conversion factor for length unit.
double precision	mod_global_parameters::time_convert_factor
	Conversion factor for time unit.
double precision	mod_global_parameters::tfixgrid
	Fix the AMR grid after this time.
double precision	mod_global_parameters::unit_length =1.d0
	Physical scaling factor for length.
double precision	mod_global_parameters::unit_time =1.d0
	Physical scaling factor for time.
double precision	mod_global_parameters::unit_density =1.d0
	Physical scaling factor for density.
double precision	mod_global_parameters::unit_velocity =1.d0
	Physical scaling factor for velocity.
double precision	mod_global_parameters::unit_temperature =1.d0
	Physical scaling factor for temperature.
double precision	mod_global_parameters::unit_pressure =1.d0
	Physical scaling factor for pressure.
double precision	mod_global_parameters::unit_magneticfield =1.d0
	Physical scaling factor for magnetic field.
double precision	mod_global_parameters::unit_numberdensity =1.d0
	Physical scaling factor for number density.
double precision	mod_global_parameters::unit_charge =1.d0
	Physical scaling factor for charge.
double precision	mod_global_parameters::unit_mass =1.d0
	Physical scaling factor for mass.
double precision	mod_global_parameters::c_norm =1.d0
	Normalised speed of light.
double precision	mod_global_parameters::unit_opacity =1.d0
	Physical scaling factor for Opacity.
double precision	mod_global_parameters::unit_radflux =1.d0
	Physical scaling factor for radiation flux.
double precision	mod_global_parameters::small_temperature
	error handling
double precision	mod_global_parameters::small_pressure
double precision	mod_global_parameters::small_density
double precision	mod_global_parameters::phys_trac_mask
double precision	mod_global_parameters::bdip =0.d0
	amplitude of background dipolar, quadrupolar, octupolar, user's field
double precision	mod_global_parameters::bquad =0.d0
double precision	mod_global_parameters::boct =0.d0
double precision	mod_global_parameters::busr =0.d0
double precision	mod_global_parameters::xload
	Stores the memory and load imbalance, used in printlog.
double precision	mod_global_parameters::xmemory
double precision	mod_global_parameters::tvdlfeps
double precision	mod_global_parameters::rk_a21
	RK2(alfa) method parameters from Butcher tableau.
double precision	mod_global_parameters::rk_b1
double precision	mod_global_parameters::rk_b2
double precision	mod_global_parameters::imex222_lambda
	IMEX-222(lambda) one-parameter family of schemes.
double precision	mod_global_parameters::rk_beta11
double precision	mod_global_parameters::rk_beta22
double precision	mod_global_parameters::rk_beta33
double precision	mod_global_parameters::rk_beta44
double precision	mod_global_parameters::rk_c2
double precision	mod_global_parameters::rk_c3
double precision	mod_global_parameters::rk_c4
double precision	mod_global_parameters::rk_alfa21
double precision	mod_global_parameters::rk_alfa22
double precision	mod_global_parameters::rk_alfa31
double precision	mod_global_parameters::rk_alfa33
double precision	mod_global_parameters::rk_alfa41
double precision	mod_global_parameters::rk_alfa44
double precision	mod_global_parameters::rk_beta54
double precision	mod_global_parameters::rk_beta55
double precision	mod_global_parameters::rk_alfa53
double precision	mod_global_parameters::rk_alfa54
double precision	mod_global_parameters::rk_alfa55
double precision	mod_global_parameters::rk_c5
double precision	mod_global_parameters::rk3_a21
double precision	mod_global_parameters::rk3_a31
double precision	mod_global_parameters::rk3_a32
double precision	mod_global_parameters::rk3_b1
double precision	mod_global_parameters::rk3_b2
double precision	mod_global_parameters::rk3_b3
double precision	mod_global_parameters::rk3_c2
double precision	mod_global_parameters::rk3_c3
double precision	mod_global_parameters::ars_gamma
	IMEX_ARS3 parameter ars_gamma.
double precision	mod_global_parameters::imex_a21
double precision	mod_global_parameters::imex_a31
double precision	mod_global_parameters::imex_a32
double precision	mod_global_parameters::imex_b1
double precision	mod_global_parameters::imex_b2
double precision	mod_global_parameters::imex_ha21
double precision	mod_global_parameters::imex_ha22
double precision	mod_global_parameters::imex_b3
double precision	mod_global_parameters::imex_c2
double precision	mod_global_parameters::imex_c3
double precision	mod_global_parameters::imex_a22
	IMEX_CB3a extra parameters.
double precision	mod_global_parameters::imex_a33
double precision	mod_global_parameters::imex_ha32
double precision	mod_global_parameters::cmax_global
	global fastest wave speed needed in fd scheme and glm method
double precision	mod_global_parameters::vmax_global
	global fastest flow speed needed in glm method
double precision, dimension(^nd)	mod_global_parameters::a2max_global
	global largest a2 for schmid scheme
double precision	mod_global_parameters::cs2max_global
	global largest cs2 for hyperbolic thermal conduction
double precision	mod_global_parameters::instrument_resolution_factor
	times for enhancing spatial resolution for EUV image/spectra
double precision	mod_global_parameters::r_occultor
	the white light emission below it (unit=Rsun) is not visible
double precision	mod_global_parameters::los_theta
	direction of the line of sight (LOS)
double precision	mod_global_parameters::los_phi
double precision	mod_global_parameters::image_rotate
	rotation of image
double precision, dimension(1:3)	mod_global_parameters::x_origin
	where the is the origin (X=0,Y=0) of image
character(len=std_len)	mod_global_parameters::filename_spectrum
	Base file name for synthetic EUV spectrum output.
double precision	mod_global_parameters::spectrum_window_min
	spectral window
double precision	mod_global_parameters::spectrum_window_max
double precision	mod_global_parameters::location_slit
	location of the slit
double precision	mod_global_parameters::r_opt_thick
	for spherical coordinate, region below it (unit=Rsun) is treated as not transparent
double precision, dimension(^nd, 2)	mod_global_parameters::writespshift
	domain percentage cut off shifted from each boundary when converting data
double precision, dimension(:), allocatable	mod_global_parameters::entropycoef
double precision, dimension(:), allocatable	mod_global_parameters::dg
	extent of grid blocks in domain per dimension, in array over levels
double precision, dimension(:,:), allocatable	mod_global_parameters::rnode
	Corner coordinates.
double precision, dimension(:,:), allocatable	mod_global_parameters::rnode_sub
double precision, dimension(:,:), allocatable	mod_global_parameters::dx
double precision, dimension(:), allocatable	mod_global_parameters::refine_threshold
	Error tolerance for refinement decision.
double precision, dimension(:), allocatable	mod_global_parameters::derefine_ratio
	Error tolerance ratio for derefinement decision.
double precision, dimension(:,:), allocatable	mod_global_parameters::qstretch
	Stretching factors and first cell size for each AMR level and dimension.
double precision, dimension(:,:), allocatable	mod_global_parameters::dxfirst
double precision, dimension(:,:), allocatable	mod_global_parameters::dxfirst_1mq
double precision, dimension(:,:), allocatable	mod_global_parameters::dxmid
double precision, dimension(:), allocatable	mod_global_parameters::w_convert_factor
	Conversion factors the primitive variables.
double precision, dimension(:), allocatable	mod_global_parameters::w_refine_weight
	Weights of variables used to calculate error for mesh refinement.
double precision, dimension(:), allocatable	mod_global_parameters::amr_wavefilter
	refinement: lohner estimate wavefilter setting
integer, parameter	mod_global_parameters::nsavehi =100
	Maximum number of saves that can be defined by tsave or itsave.
integer, parameter	mod_global_parameters::nfile = 5
	Number of output methods.
double precision, dimension(nsavehi, nfile)	mod_global_parameters::tsave
	Save output of type N on times tsave(:, N)
double precision, dimension(nfile)	mod_global_parameters::tsavelast
double precision, dimension(nfile)	mod_global_parameters::dtsave
	Repeatedly save output of type N when dtsave(N) simulation time has passed.
double precision, dimension(nfile)	mod_global_parameters::tsavestart
	Start of read out (not counting specified read outs)
integer, parameter	mod_global_parameters::ndim =^ND
	Number of spatial dimensions for grid variables.
integer	mod_global_parameters::npe
	The number of MPI tasks.
integer	mod_global_parameters::mype
	The rank of the current MPI task.
integer	mod_global_parameters::icomm
	The MPI communicator.
integer	mod_global_parameters::ierrmpi
	A global MPI error return code.
integer	mod_global_parameters::log_fh
	MPI file handle for logfile.
integer	mod_global_parameters::type_block
	MPI type for block including ghost cells and its size.
integer	mod_global_parameters::size_block
integer	mod_global_parameters::type_coarse_block
	MPI type for block coarsened by 2, and for its children blocks.
integer, dimension(2^d &)	mod_global_parameters::type_sub_block
integer, dimension(^nd, 2^d &)	mod_global_parameters::type_coarse_block_stg
	MPI type for staggered block coarsened by 2, and for its children blocks.
integer, dimension(^nd, 2^d &)	mod_global_parameters::type_sub_block_stg
integer	mod_global_parameters::type_block_io
	MPI type for IO: block excluding ghost cells.
integer	mod_global_parameters::size_block_io
integer	mod_global_parameters::type_block_io_stg
	MPI type for IO of staggered variables.
integer	mod_global_parameters::size_block_io_stg
integer	mod_global_parameters::type_block_xc_io
	MPI type for IO: cell corner (xc) or cell center (xcc) coordinates.
integer	mod_global_parameters::type_block_xcc_io
integer	mod_global_parameters::type_block_wc_io
	MPI type for IO: cell corner (wc) or cell center (wcc) variables.
integer	mod_global_parameters::type_block_wcc_io
integer	mod_global_parameters::ixm
	the mesh range of a physical block without ghost cells
integer	mod_global_parameters::ll
integer	mod_global_parameters::r_ = -1
	Indices for cylindrical coordinates FOR TESTS, negative value when not used:
integer	mod_global_parameters::phi_ = -1
integer	mod_global_parameters::z_ = -1
integer	mod_global_parameters::ndir =ndim
	Number of spatial dimensions (components) for vector variables.
integer, parameter	mod_global_parameters::sdim =3
	starting dimension for electric field
integer	mod_global_parameters::domain_nx
	number of cells for each dimension in level-one mesh
integer	mod_global_parameters::block_nx
	number of cells for each dimension in grid block excluding ghostcells
integer, parameter	mod_global_parameters::ixglo
	Lower index of grid block arrays (always 1)
integer	mod_global_parameters::ixghi
	Upper index of grid block arrays.
integer, parameter	mod_global_parameters::ixgslo
	Lower index of stagger grid block arrays (always 0)
integer	mod_global_parameters::ixgshi
	Upper index of stagger grid block arrays.
integer	mod_global_parameters::nghostcells = 2
	Number of ghost cells surrounding a grid.
integer, parameter	mod_global_parameters::stretch_none = 0
	No stretching.
integer, parameter	mod_global_parameters::stretch_uni = 1
	Unidirectional stretching from a side.
integer, parameter	mod_global_parameters::stretch_symm = 2
	Symmetric stretching around the center.
integer, dimension(ndim)	mod_global_parameters::stretch_type
	What kind of stretching is used per dimension.
integer, dimension(ndim)	mod_global_parameters::nstretchedblocks_baselevel
	(even) number of (symmetrically) stretched blocks at AMR level 1, per dimension
integer, dimension(:,:), allocatable	mod_global_parameters::nstretchedblocks
	(even) number of (symmetrically) stretched blocks per level and dimension
integer, parameter	mod_global_parameters::nodehi =^ND+1
	grid hierarchy info (level and grid indices)
integer, parameter	mod_global_parameters::plevel_ =1
integer, parameter	mod_global_parameters::pig
integer, parameter	mod_global_parameters::d_ =plevel_+^D
integer, dimension(:,:), allocatable	mod_global_parameters::node
integer, dimension(:,:), allocatable	mod_global_parameters::node_sub
integer, parameter	mod_global_parameters::rnodehi =3*^ND
	grid location info (corner coordinates and grid spacing)
integer, parameter	mod_global_parameters::rpxmin0_ =0
integer, parameter	mod_global_parameters::rpxmin
integer, parameter	mod_global_parameters::rpxmax0_ =^ND
integer, parameter	mod_global_parameters::rpxmax
integer, parameter	mod_global_parameters::rpdx
integer	mod_global_parameters::index_latest_data
	index number of the latest existing data file
integer, dimension(nsavehi, nfile)	mod_global_parameters::itsave
	Save output of type N on iterations itsave(:, N)
integer, dimension(nfile)	mod_global_parameters::itsavelast
integer, dimension(nfile)	mod_global_parameters::ditsave
	Repeatedly save output of type N when ditsave(N) time steps have passed.
integer, dimension(nfile)	mod_global_parameters::isavet
integer, dimension(nfile)	mod_global_parameters::isaveit
integer	mod_global_parameters::collapselevel
	The level at which to produce line-integrated / collapsed output.
integer, dimension(1:nfile)	mod_global_parameters::n_saves
	Number of saved files of each type.
integer	mod_global_parameters::snapshotnext
	IO: snapshot and collapsed views output numbers/labels.
integer	mod_global_parameters::collapsenext
integer, parameter	mod_global_parameters::filelog_ = 1
	Constant indicating log output.
integer, parameter	mod_global_parameters::fileout_ = 2
	Constant indicating regular output.
integer, parameter	mod_global_parameters::fileslice_ = 3
	Constant indicating slice output.
integer, parameter	mod_global_parameters::filecollapse_ = 4
	Constant indicating collapsed output.
integer, parameter	mod_global_parameters::fileanalysis_ = 5
	Constant indicating analysis output (see Writing a custom analysis subroutine)
integer, parameter	mod_global_parameters::unitstdin =5
	Unit for standard input.
integer, parameter	mod_global_parameters::unitterm =6
	Unit for standard output.
integer, parameter	mod_global_parameters::uniterr =6
	Unit for error messages.
integer, parameter	mod_global_parameters::unitpar =9
	file handle for IO
integer, parameter	mod_global_parameters::unitconvert =10
integer, parameter	mod_global_parameters::unitslice =11
integer, parameter	mod_global_parameters::unitsnapshot =12
integer, parameter	mod_global_parameters::unitcollapse =13
integer, parameter	mod_global_parameters::unitanalysis =14
integer	mod_global_parameters::nwauxio
	Number of auxiliary variables that are only included in output.
integer	mod_global_parameters::level_io
integer	mod_global_parameters::level_io_min
integer	mod_global_parameters::level_io_max
integer	mod_global_parameters::type_endian
integer	mod_global_parameters::snapshotini
	Resume from the snapshot with this index.
integer	mod_global_parameters::number_equi_vars = 0
	number of equilibrium set variables, besides the mag field
integer	mod_global_parameters::phys_trac_type =1
integer	mod_global_parameters::phys_trac_finegrid =4
integer, parameter	mod_global_parameters::type_maxsum =1
	integer switchers for type courant
integer, parameter	mod_global_parameters::type_summax =2
integer, parameter	mod_global_parameters::type_minimum =3
integer	mod_global_parameters::max_blocks
	The maximum number of grid blocks in a processor.
integer, parameter	mod_global_parameters::nlevelshi = 20
	The maximum number of levels in the grid refinement.
integer	mod_global_parameters::refine_max_level
	Maximal number of AMR levels.
integer	mod_global_parameters::itfixgrid
	Fix the AMR grid after this many time steps.
integer	mod_global_parameters::ditregrid
	Reconstruct the AMR grid once every ditregrid iteration(s)
integer	mod_global_parameters::refine_criterion
	select types of refine criterion
integer	mod_global_parameters::nbufferx
	Number of cells as buffer zone.
integer	mod_global_parameters::levmin
integer	mod_global_parameters::levmax
integer	mod_global_parameters::levmax_sub
integer	mod_global_parameters::iprob
	problem switch allowing different setups in same usr_mod.t
integer, dimension(3, 3)	mod_global_parameters::kr
	Kronecker delta tensor.
integer, dimension(3, 3, 3)	mod_global_parameters::lvc
	Levi-Civita tensor.
integer	mod_global_parameters::type_courant =1
	How to compute the CFL-limited time step.
integer	mod_global_parameters::it
	Number of time steps taken.
integer	mod_global_parameters::it_max
	Stop the simulation after this many time steps have been taken.
integer	mod_global_parameters::it_init
	initial iteration count
integer	mod_global_parameters::slowsteps
	If > 1, then in the first slowsteps-1 time steps dt is reduced by a factor \( 1 - (1- step/slowsteps)^2 \).
integer	mod_global_parameters::istep
	Index of the sub-step in a multi-step time integrator.
integer	mod_global_parameters::nstep
	How many sub-steps the time integrator takes.
integer, parameter	mod_global_parameters::fs_hll =1
	flux schemes
integer, parameter	mod_global_parameters::fs_hllc =2
integer, parameter	mod_global_parameters::fs_hlld =3
integer, parameter	mod_global_parameters::fs_hllcd =4
integer, parameter	mod_global_parameters::fs_tvdlf =5
integer, parameter	mod_global_parameters::fs_tvdmu =6
integer, parameter	mod_global_parameters::fs_tvd =7
integer, parameter	mod_global_parameters::fs_hancock =8
integer, parameter	mod_global_parameters::fs_cd =9
integer, parameter	mod_global_parameters::fs_cd4 =10
integer, parameter	mod_global_parameters::fs_fd =11
integer, parameter	mod_global_parameters::fs_source =12
integer, parameter	mod_global_parameters::fs_nul =13
integer	mod_global_parameters::t_stepper =0
	time stepper type
integer, parameter	mod_global_parameters::onestep =1
integer, parameter	mod_global_parameters::twostep =2
integer, parameter	mod_global_parameters::threestep =3
integer, parameter	mod_global_parameters::fourstep =4
integer, parameter	mod_global_parameters::fivestep =5
integer	mod_global_parameters::t_integrator =0
	time integrator method
integer, parameter	mod_global_parameters::forward_euler =1
integer, parameter	mod_global_parameters::predictor_corrector =2
integer, parameter	mod_global_parameters::ssprk3 =3
integer, parameter	mod_global_parameters::ssprk4 =4
integer, parameter	mod_global_parameters::ssprk5 =5
integer, parameter	mod_global_parameters::imex_euler =6
integer, parameter	mod_global_parameters::imex_sp =7
integer, parameter	mod_global_parameters::rk2_alf =8
integer, parameter	mod_global_parameters::ssprk2 =9
integer, parameter	mod_global_parameters::imex_midpoint =10
integer, parameter	mod_global_parameters::imex_trapezoidal =11
integer, parameter	mod_global_parameters::imex_222 =12
integer, parameter	mod_global_parameters::rk3_bt =13
integer, parameter	mod_global_parameters::imex_ars3 =14
integer, parameter	mod_global_parameters::imex_232 =15
integer, parameter	mod_global_parameters::imex_cb3a =16
integer, parameter	mod_global_parameters::rk4 =17
integer, dimension(:), allocatable	mod_global_parameters::ng
	number of grid blocks in domain per dimension, in array over levels
integer, dimension(:), allocatable	mod_global_parameters::flux_method
	Which flux scheme of spatial discretization to use (per grid level)
integer, dimension(:), allocatable	mod_global_parameters::typepred1
	The spatial discretization for the predictor step when using a two step PC method.
integer, dimension(:), allocatable	mod_global_parameters::type_limiter
	Type of slope limiter used for reconstructing variables on cell edges.
integer, dimension(:), allocatable	mod_global_parameters::type_gradient_limiter
	Type of slope limiter used for computing gradients or divergences, when typegrad or typediv are set to 'limited'.
integer	mod_global_parameters::b0i =0
	background magnetic field location indicator
integer	mod_global_parameters::prolong_limiter =0
	Limiter used for prolongation to refined grids and ghost cells.
integer	mod_global_parameters::boundspeed
	bound (left/min and right.max) speed of Riemann fan
integer	mod_global_parameters::nxdiffusehllc
integer	mod_global_parameters::ssprk_order
	SSPRK choice of methods (both threestep and fourstep, Shu-Osher 2N* implementation) also fivestep SSPRK54.
integer	mod_global_parameters::rk3_switch
	RK3 Butcher table.
integer	mod_global_parameters::imex_switch
	IMEX_232 choice and parameters.
integer, dimension(:, :), allocatable	mod_global_parameters::typeboundary
	Array indicating the type of boundary condition per variable and per physical boundary.
integer, parameter	mod_global_parameters::bc_special =1
	boundary condition types
integer, parameter	mod_global_parameters::bc_cont =2
integer, parameter	mod_global_parameters::bc_symm =3
integer, parameter	mod_global_parameters::bc_asymm =4
integer, parameter	mod_global_parameters::bc_periodic =5
integer, parameter	mod_global_parameters::bc_aperiodic =6
integer, parameter	mod_global_parameters::bc_noinflow =7
integer, parameter	mod_global_parameters::bc_data =8
integer, parameter	mod_global_parameters::bc_character =9
integer, parameter	mod_global_parameters::bc_icarus =10
integer	mod_global_parameters::wavelength
	wavelength for output
integer	mod_global_parameters::emin_sxr
integer	mod_global_parameters::emax_sxr
integer	mod_global_parameters::spectrum_wl
	wave length for spectrum
integer	mod_global_parameters::direction_slit
	direction of the slit (for dat resolution only)
logical	mod_global_parameters::slab
	Cartesian geometry or not.
logical	mod_global_parameters::slab_uniform
	uniform Cartesian geometry or not (stretched Cartesian)
logical	mod_global_parameters::local_timestep = .false.
	each cell has its own timestep or not
logical, dimension(nfile)	mod_global_parameters::save_file
	whether or not to save an output file
logical	mod_global_parameters::stretch_uncentered
	If true, adjust mod_geometry routines to account for grid stretching (but the flux computation will not)
logical, dimension(ndim)	mod_global_parameters::stretched_dim
	True if a dimension is stretched.
logical	mod_global_parameters::resume_previous_run
	If true, restart a previous run from the latest snapshot.
logical	mod_global_parameters::convert
	If true and restart_from_file is given, convert snapshots to other file formats.
logical	mod_global_parameters::autoconvert
	If true, already convert to output format during the run.
logical	mod_global_parameters::saveprim
	If true, convert from conservative to primitive variables in output.
logical	mod_global_parameters::time_advance
	do time evolving
logical	mod_global_parameters::final_dt_exit
	Force timeloop exit when final dt < dtmin.
logical	mod_global_parameters::reset_time
	If true, reset iteration count and global_time to original values, and start writing snapshots at index 0.
logical	mod_global_parameters::reset_it
	If true, reset iteration count to 0.
logical	mod_global_parameters::final_dt_reduction
	If true, allow final dt reduction for matching time_max on output.
logical	mod_global_parameters::firstprocess
	If true, call initonegrid_usr upon restarting.
logical	mod_global_parameters::pass_wall_time
	If true, wall time is up, modify snapshotnext for later overwrite.
logical	mod_global_parameters::h_correction =.false.
	If true, do H-correction to fix the carbuncle problem at grid-aligned shocks.
logical	mod_global_parameters::reset_grid
	If true, rebuild the AMR grid upon restarting.
logical	mod_global_parameters::stagger_grid =.false.
	True for using stagger grid.
logical	mod_global_parameters::record_electric_field =.false.
	True for record electric field.
logical	mod_global_parameters::dat_resolution
	resolution of the images
logical, dimension(ndim)	mod_global_parameters::collapse
	If collapse(DIM) is true, generate output integrated over DIM.
logical	mod_global_parameters::nocartesian
	IO switches for conversion.
logical	mod_global_parameters::use_particles =.false.
	Use particles module or not.
logical	mod_global_parameters::use_multigrid = .false.
	Use multigrid (only available in 2D and 3D)
logical	mod_global_parameters::prolongprimitive =.false.
	prolongate primitive variables in level-jump ghost cells
logical	mod_global_parameters::coarsenprimitive =.false.
	coarsen primitive variables in level-jump ghost cells
logical	mod_global_parameters::crash =.false.
	Save a snapshot before crash a run met unphysical values.
logical	mod_global_parameters::check_small_values =.true.
	check and optionally fix unphysical small values (density, gas pressure)
logical	mod_global_parameters::fix_small_values =.false.
	fix small values with average or replace methods
logical	mod_global_parameters::b0field =.false.
	split magnetic field as background B0 field
logical	mod_global_parameters::b0fieldalloccoarse =.false.
logical	mod_global_parameters::si_unit =.false.
	Use SI units (.true.) or use cgs units (.false.)
logical	mod_global_parameters::phys_trac =.false.
	Use TRAC for MHD or 1D HD.
logical	mod_global_parameters::fix_conserve_global = .true.
	Whether to apply flux conservation at refinement boundaries.
logical	mod_global_parameters::flux_adaptive_diffusion
logical	mod_global_parameters::flathllc
logical	mod_global_parameters::flatcd
logical	mod_global_parameters::flatsh
logical	mod_global_parameters::source_split_usr
	Use split or unsplit way to add user's source terms, default: unsplit.
logical	mod_global_parameters::any_source_split =.false.
	if any normal source term is added in split fasion
logical	mod_global_parameters::dimsplit
logical	mod_global_parameters::use_imex_scheme
	whether IMEX in use or not
logical	mod_global_parameters::need_global_cmax =.false.
	need global maximal wave speed
logical	mod_global_parameters::need_global_a2max =.false.
	global value for schmid scheme
logical	mod_global_parameters::need_global_cs2max =.false.
	global value for csound speed
logical, dimension(ndim)	mod_global_parameters::periodb
	True for dimensions with periodic boundaries.
logical, dimension(2, ndim)	mod_global_parameters::poleb
	Indicates whether there is a pole at a boundary.
logical, dimension(ndim)	mod_global_parameters::aperiodb
	True for dimensions with aperiodic boundaries.
logical	mod_global_parameters::save_physical_boundary
	True for save physical boundary cells in dat files.
logical	mod_global_parameters::ghost_copy =.false.
	whether copy values instead of interpolation in ghost cells of finer blocks
logical	mod_global_parameters::internalboundary
	if there is an internal boundary
logical	mod_global_parameters::activate_unit_arcsec
	use arcsec as length unit of images/spectra
logical	mod_global_parameters::big_image
	big image
logical, dimension(:), allocatable	mod_global_parameters::phyboundblock
	True if a block has any physical boundary.
logical, dimension(:), allocatable	mod_global_parameters::w_write
	if true write the w variable in output
logical, dimension(:), allocatable	mod_global_parameters::writelevel
logical, dimension(:), allocatable	mod_global_parameters::loglimit
logical, dimension(:), allocatable	mod_global_parameters::logflag
character(len= *), parameter	mod_global_parameters::undefined = 'undefined'
character(len=40), dimension(nfile), parameter	mod_global_parameters::output_names = ['log ', 'normal ', 'slice ', 'collapsed', 'analysis ']
	Names of the output methods.
character(len=std_len)	mod_global_parameters::convert_type
	Which format to use when converting.
character(len=std_len)	mod_global_parameters::collapse_type
character(len=std_len)	mod_global_parameters::usr_filename
	User parameter file.
character(len=std_len)	mod_global_parameters::base_filename
	Base file name for simulation output, which will be followed by a number.
character(len=std_len)	mod_global_parameters::restart_from_file
	If not 'unavailable', resume from snapshot with this base file name.
character(len=std_len)	mod_global_parameters::typefilelog
	Which type of log to write: 'normal', 'special', 'regression_test'.
character(len=std_len)	mod_global_parameters::typeaverage
character(len=std_len)	mod_global_parameters::typedimsplit
character(len=std_len)	mod_global_parameters::geometry_name ='default'
character(len=std_len)	mod_global_parameters::typepoly
character(len=std_len)	mod_global_parameters::filename_euv
	Base file name for synthetic EUV emission output.
character(len=std_len)	mod_global_parameters::filename_sxr
	Base file name for synthetic SXR emission output.
character(len=std_len)	mod_global_parameters::filename_whitelight
	Base file name for synthetic white light.
character(len=std_len)	mod_global_parameters::whitelight_instrument
	white light observation instrument
character(len=std_len)	mod_global_parameters::typetvd
	Which type of TVD method to use.
character(len=std_len)	mod_global_parameters::typediv
character(len=std_len)	mod_global_parameters::typegrad
character(len=std_len), dimension(:), allocatable	mod_global_parameters::par_files
	Which par files are used as input.
character(len=std_len), dimension(:), allocatable	mod_global_parameters::typeentropy
	Which type of entropy fix to use with Riemann-type solvers.
type(state), pointer	mod_global_parameters::block
	Block pointer for using one block and its previous state.