]>A Two-Zone Multigrid Model for SI Engine Combustion Simulation Using Detailed Chemistry : Figure 12
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Figure 12: Iso-surface of flame front (black line) and NOx distribution at C A = 1 8  deg ATDC simulated using two-zone MG model with different searching levels and skipping high-temperature cells ( 𝑇 > 8 0 0  K) in the unburned region.