Hypre Inputs

The following inputs control the hypre settings and are read directly by AMReX when we use hypre as the bottom solver, i.e., when nodal_proj.bottom_solver = hypre and/or when mac_proj.bottom_solver = hypre (see Multigrid Inputs) These settings must be preceded by the hypre_namespace setting corresponding to the solver (see Multigrid Inputs).

NOTE: By default, the MAC and nodal projections use the same settings specified with the namespace hypre, however the solvers can be configured separately by specifying mac_proj.hypre_namespace and nodal_proj.hypre_namespace.

When not using the default namespace hypre, additional restrictions apply:

1. Both mac_proj.hypre_namespace and nodal_proj.hypre_namespace must be set.

2. mac_proj.hypre_namespace and nodal_proj.hypre_namespace must be unique.

	Description	Type	Default
verbose	Verbosity of hypre	Int	0
adjust_singular_matrix	Should be true if the problem to be solved has singular matrix	Bool	false
hypre_solver	Type of hypre solver Options are BoomerAMG, GMRES, COGMRES, LGMRES, FlexGMRES, BiCGSTAB, PCG or Hybrid	String	BoomerAMG
hypre_preconditioner	Type of preconditioner Options are BoomerAMG or euclid	String	none
recompute_preconditioner	Recompute preconditioner during runs	Bool	true
write_matrix_files	Write out matrix into text files	Bool	false
overwrite_existing_matrix_files	Over-write existing matrix files	Bool	false
bamg_verbose	Verbosity of BoomerAMG preconditioner	Int	0
bamg_logging	When using BoomerAMG preconditioner See HYPRE_BoomerAMGSetLogging	Int	0
bamg_coarsen_type	When using BoomerAMG preconditioner See HYPRE_BoomerAMGSetCoarsenType	Int	6
bamg_cycle_type	When using BoomerAMG preconditioner See HYPRE_BoomerAMGSetCycleType	Int	1
bamg_relax_type	When using BoomerAMG preconditioner See HYPRE_BoomerAMGSetRelaxType	Int	6
bamg_relax_order	When using BoomerAMG preconditioner See HYPRE_BoomerAMGSetRelaxOrder	Int	1
bamg_num_sweeps	When using BoomerAMG preconditioner See HYPRE_BoomerAMGSetNumSweeps	Int	2
bamg_max_levels	When using BoomerAMG preconditioner See HYPRE_BoomerAMGSetMaxLevels	Int	20
bamg_strong_threshold	When using BoomerAMG preconditioner See HYPRE_BoomerAMGSetStrongThreshold	Real	0.57
bamg_interp_type	When using BoomerAMG preconditioner HYPRE_BoomerAMGSetInterpType	Int	0