Numerical study on the jet formation due to Rayleigh-Taylor instability

The characteristic surface deformation quantities in the late-time stage of Rayleigh-Taylor (RT) instability were investigated numerically to link the present RT instability with the low-speed liquid jet theory, which was overlooked in previous studies. The velocity and width at the maximum-pressure location mirrored those associated with a vertical jet emanating downwards of an orifice injector under gravity. Thus, the results from laboratory low-speed jet emanation experiments were useful for predicting the disintegration behavior of a liquid jet formed by RT instability.