Table 4.

Iteration numbers (it.) per Newton step and computational time (in s) per Newton step for the all-floating and the classical FETI approach with linear ansatz functions comparing the three considered preconditioners. The penalty parameter κ was varied from 10 to 1000 kPa. Mesh: mesh of the aorta subdivided in 480 subdomains, computed with 480 cores.

all-floating
κ	identity preconditioner		lumped preconditioner		Dirichlet preconditioner
10	1052 it.	57.6 s	160 it.	31.0 s	56 it.	22.8 s
100	1879 it.	94.6 s	305 it.	29.5 s	85 it.	25.4 s
1000	4122 it.	177.1 s	681 it.	48.8 s	209 it.	31.8 s
classical
κ	identity preconditioner		lumped preconditioner		Dirichlet preconditioner
10	2056 it.	98.7 s	305 it.	35.5 s	117 it.	27.2 s
100	3711 it.	149.8 s	540 it.	35.5 s	144 it.	28.4 s
1000	8245 it.	327.8 s	1190 it.	60.9 s	263 it.	32.9 s