The influences of initialmixture distribution on localized forced ignition of globally stoichiometric stratified mixtures have been analyzed using three-dimensional compressible direct numerical simulations. The globally stoichiometric mixtures (i.e., = 1: 0) for different root-meansquare (rms) values of equivalence ratio (i.e., phi' = 0.2, 0.4, and 0.6) and the Taylormicro-scale l phi of equivalence ratio phi variation (i.e., l phi/l(f) = 2.1, 5.5, and 8.3 with l(f) being the Zel'dovich flame thickness of stoichiometric mixture) have been analyzed for different initial rms values of turbulent velocity u'. The equivalence ratio variation is initialized following both Gaussian and bi-modal distributions for a given set of values of phi' and l phi/l(f) in order to analyze the effects of mixture distribution. The localized forced ignition is accounted for by considering a source term in the energy conservation equation that deposits energy for a stipulated time interval. It has been demonstrated that the initial equivalence ratio distribution has significant effects on the extent of burning of stratified mixtures following successful localized forced ignition. It has been found that an increase in u'/S-b

Keywords:Direct numerical simulation (DNS);Equivalence ratio;Equivalence ratio distribution;Localized forced ignition;Stratified mixture