A Two-Zone Multigrid Model for SI Engine Combustion Simulation Using Detailed Chemistry

Table 2

Computational time of one-zone MG model with different searching levels (CA=−6.3 to 70).

Case	w/o MG	MG3	MG4	MG-global	MG-adaptive
CPU time [hrs]	173.3	55.3	45.6	5.5	52.6
Wall time [hrs]	48.6	18.4	16.5	5.5	17.9
Speedup [−]	3.6	9.4	10.5	31.5	9.7