Direct Numerical Simulations of the Impact of High Turbulence Intensities and Volume Viscosity on Premixed Methane Flames

Figure 3

Instantaneous contours of the mass fraction of H₂O₂ (along the 𝑧=1.5 cm plane) at different times (𝑡=0.1, 0.25, and 0.5 millisecond) with (a) and without (b) volume viscosity. The concentric circles correspond, respectively, to three time instances with increasing radii.

(a) 𝜅≠0

(b) 𝜅=0