Table 5 Boundary conditions setting.

From: Synergistic optimization of combustion chamber design and hydrogen injection strategies for ultra-lean combustion in hydrogen engines

Boundary

Boundary type

Temperature (K)

Pressure (bar)

Head

Fixed wall

570

NA

Cylinder wall

Fixed wall

450

NA

Piston

Moving wall

550

NA

Inlet

Inflow

303

1.5

Outlet

Outflow

600

1.0

Intake port

Fixed wall

320

NA

Exhaust port

Fixed wall

500

NA

Spark plug electrode

Fixed wall

950

NA