Cellular structures on premixed flames in a uniform laminar flow

These results show a good qualitative agreement with the model of a threefold instability mechanism. The marginal stability is crossed when the strength of the hydrodynamic instability is increased following an increase in the normal flame speed. The critical velocity is lowered by decreasing the Lewis number due to the destabilizing influence of transverse mass fluxes. As expected, the critical wavelength is principally related to the critical flame speed and does not vary significantly from one fuel to another. This analysis has also led to a good estimation of the behavior of stable flame fronts in a weakly turbulent flow /11/.