Refinement parameters

The block named &REFINE_PARAMS contains the parameters related to grid refinement.

Variable name	Fortran type	Default value	Description
x_refine	real array	0.0	Geometry-based strategy: center of the refined region at each level of the AMR grid.
y_refine	real array	0.0	Geometry-based strategy: center of the refined region at each level of the AMR grid.
z_refine	real array	0.0	Geometry-based strategy: center of the refined region at each level of the AMR grid.
r_refine	real array	1e10	Geometry-based strategy: diameter (yes, not a radius) of the refined region at each level.
a_refine	real array	1.0	Geometry-based strategy: ratio Y/X of the refined region at each level.
b_refine	real array	1.0	Geometry-based strategy: ratio Z/X of the refined region at each level.
exp_refine	real array	2.0	Geometry-based strategy: exponent of the norm.
jeans_refine	real array	-1.0	Jeans refinement strategy: each level is refined if the cell size exceeds the local Jeans length divided by jeans_refine(ilevel).
mass_cut_refine	real	-1.0	Mass threshold for particle-based refinement
m_refine	real array	-1.0	Quasi-Lagrangian strategy: each level is refined if the baryons mass in a cell exceeds m_refine(ilevel)*mass_sph, or if the number of dark matter particles exceeds m_refine(ilevel), whatever the mass is.
mass_sph	real	0.0	Quasi-Lagrangian strategy: mass_sph is used to set a typical mass scale. For cosmo runs, its value is set automatically.
err_grad_d	real	-1.0	Discontinuity-based strategy: density gradient relative variations above which a cell is refined
err_grad_u	real	-1.0	Discontinuity-based strategy: velocity gradient relative variations above which a cell is refined
err_grad_p	real	-1.0	Discontinuity-based strategy: pressure gradient relative variations above which a cell is refined
floor_d	real	1e-10	Density floor below which gradients are ignored
floor_u	real	1e-10	Velocity floor below which gradients are ignored
floor_p	real	1e-10	Pressure floor below which gradients are ignored
ivar_refine	int	-1	Variable index for refinement
var_cut_refine	real	-1.0	Threshold for variable-based refinement
interpol_var	int	0	Variables used to perform interpolation (prolongation) and averaging (restriction). interpol_type=0: conservatives; interpol_type=1: primitives
interpol_type	int	1	Type of slope limiter used in the interpolation scheme for newly refined cells. interpol_type=0: Straight injection (1st order), interpol_type=1: MinMod limiter, interpol_type=2: MonCen limiter, interpol_type=3: unlimited central slope, interpol_type=4: type 3 for velocity and type 2 for density and internal energy (if interpol_var=2)
sink_refine	bool	.false.	Refines grid around sinks to levelmax