2. Laminar burning velocity of the stoichiometric methane-air mixture is 0.4m/s at 300 K and 1 bar. Plot the turbulent burning velocity of the stoichiometric methane-air mixture as a function of nondimensional turbulence intensity (i.e. St/SL versus u/SL ) using the various expressions discussed in class. Assume a homogeneous turbulence field where the integral length scale is 3mm (large-scale turbulence) and urms varies from 0.2 to 2m/s (small-intensity turbulence). Assume also that Le=1 and kinematic viscosity of methane-air mixture can be taken as 16106m2/s. Are the three expressions valid over this range