A premixed flame within a turbulent flow exhibits a decreasing enhancement
of fuel consumption rate with increasing turbulence intensity, an effect kn
own as the bending effect. Denet has shown that flow time correlations may
be one cause of the bending effect. Using a Damkohler-Huygens front propaga
tion model, we illustrate that the removal of flow components with reduced
frequencies greater than unity (omega > kS(L)) causes a small reduction in
front area but a large reduction in the flow intensity, which is the bendin
g effect (omega is the frequency and k is the wavenumber). To be effective
in producing front area, a how mode must have a phase velocity, omega/k, sm
aller than the laminar burning velocity, S-L.