Table 1.

Solver related parameters.

γ = 1	Cycle index (1 for V-cycle, 2 for W-cycle)
ν0 = 4	Number of smoothing steps on the coarsest grid level κ−2 (set to ν1+ν2)
ν1 = 2	Number of pre-correction smoothing steps during a V-cycle
ν2 = 2	Number of post-correction smoothing steps during a V-cycle
νb = 2	Number of extra smoothing steps near boundaries
$d_{\kappa }=\{\begin{array}{cc}{2}^{\kappa +2}& ,for\kappa \le 0\\ \frac{min\left(d_x,d_y,d_z\right)}{8}& ,for\kappa >0\end{array}$	Number of cells inward from a boundary to be included in the near-boundary extra smoothing steps
	Set to $2^{\kappa -{\kappa }_{min}}$ for κ ≤ 0
	Set to $\frac{1}{8}$ of the minimum block dimension (in x-, y-, and z-direction) for κ > 0
rκ = 1	Number of V-cycles (iterations) performed before the finest global level is reached (for levels κmin < κ < 0, which is r−1 here)
σ = 4	Factor by which the tolerance is reduced from level κ to κ + 1
Cκ = 0.05	Critical value used in the undivided gradient test in the FLAG routine
threshold_eff = 0.9	Upper limit of efficiency, any blocks below this limit will go through the splitting algorithm. (Used in the BLOCKGEN routine)
threshold_size = 103	Minimum size of a block allowed. (Used in the BLOCKGEN routine)
min_eff = 0.5	Lowest limit of efficiency allowed, any blocks below this limit will be bisected. (Used in the BLOCKGEN routine)