Influence of molecular transport on burning rate and conditioned species concentrations in highly turbulent premixed flames

Apparent inconsistency between (i) experimental and direct numerical simulation (DNS) data that show the significant influence of differential diffusion on turbulent burning rate (ii) recent complex-chemistry DNS indicate mitigation conditioned profiles various local flame characteristics at high Karlovitz numbers, is explored by analysing new obtained from lean hydrogen–air flames. Both aforementioned effects are observed same provided sampled entire computational domain. On contrary, leading edge mean brush do not mitigation, but significantly affected phenomena, e.g. because reaction zones highly curved edge. This observation consistent with a increase in computed velocity decreasing Lewis number, all results considered jointly being consonant point concept premixed combustion. The further supported comparing allowing for preferential solely single species, either atomic or molecular hydrogen.