7.2. gmres

Declared in src_gmres/gmres_namespace.H; defaults set in InitializeGmresNamespace() (src_gmres/gmres_functions.cpp).

Parameter	Type	Default	Description
precon_type	int	1	preconditioner type 1 = projection preconditioner -1 = projection preconditioner with expensive pressure update 2 = lower triangular preconditioner -2 = lower triangular preconditioner with negative sign 3 = upper triangular preconditioner -3 = upper triangular preconditioner with negative sign 4 = Block diagonal preconditioner -4 = Block diagonal preconditioner with negative sign
visc_schur_approx	int	0	use the viscosity-based BFBt Schur complement (from Georg Stadler)
p_norm_weight	Real	1.	weighting of pressure when computing norms and inner products
scale_factor	Real	1.	scale theta_alpha, beta, gamma, and b_u by this, and then scale x_p by the inverse
mg_verbose	int	0	multigrid verbosity
cg_verbose	int	0	BiCGStab (mg_bottom_solver=1) verbosity
mg_max_vcycles	int	1	maximum number of V-cycles
mg_minwidth	int	2	length of box at coarsest multigrid level
mg_bottom_solver	int	0	bottom solver type
mg_nsmooths_down	int	2	number of smooths at each level on the way down
mg_nsmooths_up	int	2	number of smooths at each level on the way up
mg_nsmooths_bottom	int	8	number of smooths at the bottom (only if mg_bottom_solver=0)
mg_max_bottom_nlevels	int	10	for mg_bottom_solver 4, number of additional levels of multigrid
mg_rel_tol	Real	1.e-9	rel_tol for Poisson solve
mg_abs_tol	Real	1.e-14	abs_tol for Poisson solve
stag_mg_verbosity	int	0	verbosity
stag_mg_max_vcycles	int	1	max number of v-cycles
stag_mg_minwidth	int	2	length of box at coarsest multigrid level
stag_mg_bottom_solver	int	0	bottom solver type
stag_mg_nsmooths_down	int	2	number of smooths at each level on the way down
stag_mg_nsmooths_up	int	2	number of smooths at each level on the way up
stag_mg_nsmooths_bottom	int	8	number of smooths at the bottom
stag_mg_max_bottom_nlevels	int	10	for stag_mg_bottom_solver 4, number of additional levels of multigrid
stag_mg_omega	Real	1.	weighted-jacobi omega coefficient
stag_mg_smoother	int	1	0 = jacobi; 1 = 2*dm-color Gauss-Seidel
stag_mg_rel_tol	Real	1.e-9	relative tolerance stopping criteria
gmres_rel_tol	Real	1.e-9	relative tolerance stopping criteria
gmres_abs_tol	Real	0.	absolute tolerance stopping criteria
gmres_verbose	int	1	gmres verbosity; if greater than 1, more residuals will be printed out
gmres_max_outer	int	20	max number of outer iterations
gmres_max_inner	int	5	max number of inner iterations, or restart number
gmres_max_iter	int	100	max number of gmres iterations
gmres_min_iter	int	1	min number of gmres iterations
gmres_spatial_order	int	2	spatial order of viscous and gradient operators in matrix “A”