The effect of laser on flame propagation is investigated by solving the equations for reactive flows with low Mach number approximation considering coarse grid and fine grid. In case of coarse grid, it is found that the flame shape is deformed in both levels of gravity owing to laser. Also the higher flame propagation speed and sharp flame tip are observed in normal gravity with laser. Whereas in case of fine grid and without laser, we have found the typical flame oscillation driven by vortical motion maintaining the flame tip shape as spherical in micro-gravity. But in case of laser, flame tip becomes sharp and propagation is accelerated retaining the oscillatory behavior. It is also seen that the sharpness in flame tip depends on the laser beam width. Further inspection, it can be said that the flame characteristics is grid dependent. However, the deformation in flame shape induced by laser and vortical movement of fluid behind the flame may be connected to the symmetrical flame oscillation which is observed by Kyozu et al.
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