A Priori Assessment of Algebraic Flame Surface Density Models in the Context of Large Eddy Simulation for Nonunity Lewis Number Flames in the Thin Reaction Zones Regime

Figure 1

Variation of ⟨Σ_gen⟩/⟨∇𝑐⟩ with Δ/𝛿_𝑧 on a log-log plot for (a–e) cases A–E. Prediction of ⟨Σ_gen⟩/⟨|∇𝑐|⟩=(Δ/𝜂_𝑖)^𝐷−2 with 𝜂_𝑖 obtained from DNS and (𝐷−2) according to (11) is also shown.

(a)  Le = 0.34

(b) Le = 0.6

(c) Le = 0.8

(d) Le = 1.0

(e) Le = 1.2