Assumptions:
• One dimensional steady subsonic flow.
• Properties of component gases depend upon temperature.
• Ideal gas behavior is valid for all the gases.
• Flame is freely propagating.
• No heat losses by radiation occur from the flame.

Model:
• Governing equations of continuity, momentum, energy, and species are written.
• Chemical kinetics is modeled using a readymade mechanism called GRI2.11 [1].

Boundary conditions:
• Inflow boundary:
  • Known inlet velocity
  • Known temperature
  • Known mass fractions of CH₄, O₂, and N₂


• Outflow boundary:
  • Communicates with the ambient
  • Pressure is 101325 Pa

Important Terms:
General Equations: