| 1 | Effect of ablation on the nonlinear spike growth for the single-mode ablative Rayleigh-Taylor instability显示文摘The effect of ablation on the nonlinear spike growth of single-mode ablative Rayleigh–Taylor instability(RTI)is studied by two-dimensional numerical simulations.It is shown that the ablation can reduce the quasi-constant velocity and significantly suppress the reacceleration of the spike in the nonlinear phase.It is also shown that the spike growth can affect the ablation-generated vorticity inside the bubble,which further affects the nonlinear bubble acceleration.The vorticity evolution is found to be correlated with the mixing width(i.e.,the sum of the bubble and spike growths)for a given wave number and ablation velocity.By considering the effects of mass ablation and vorticity,an analytical model for the nonlinear bubble and spike growth of single-mode ablative RTI is developed in this study.It is found that the nonlinear growth of the mixing width,induced by the single mode,is dominated by the bubble growth for small-scale ablative RTI,whereas it is dominated by the spike growth for classical RTI. | J.Y.Fu H.S.Zhang H.B.Cai P.L.Yao S.P.Zhu | 2023 | Matter and Radiation at Extremes2023，8，1： | 0 |
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