| Simulation of the Weakly Nonlinear Rayleigh–Taylor Instability in Spherical Geometry |
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| 作者姓名： | 杨云鹏 张靖 李志远 王立锋 吴俊峰 叶文华 贺贤土 |
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| 作者单位： | 1. School of Physics, Peking University;2. Center for Applied Physics and Technology, HEDPS, Peking University;3. Institute of Applied Physics and Computational Mathematics |
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| 基金项目： | National Natural Science Foundation of China under Grant Nos. 11575033, 11675026, and 11975053.； |
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| 摘 要： | The Rayleigh-Taylor instability at the weakly nonlinear(WN) stage in spherical geometry is studied by numerical simulation.The mode coupling processes are revealed.The results are consistent with the WN model based on parameter expansion,while higher order effects are found to be non-negligible.For Legendre mode perturbation Pn(cos B),the nonlinear saturation amplitude(NS A) of the fundamental mode decreases with the mode number n.When n is large,the spherical NSA is lower than the corresponding...
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