| Interface coupling effects of weakly nonlinear Rayleigh–Taylor instability with double interfaces |
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| 引用本文： | 李志远,王立锋,吴俊峰,叶文华.Interface coupling effects of weakly nonlinear Rayleigh–Taylor instability with double interfaces[J].中国物理 B,2020(3):318-322. |
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| 作者姓名： | 李志远 王立锋 吴俊峰 叶文华 |
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| 基金项目： | Project supported by the National Natural Science Foundation of China(Grant Nos.11575033,11675026,and 11975053);the Science Foundation from China Academy of Engineering Physics(Grant No.CX2019033)。 |
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| 摘 要： | Taking the Rayleigh–Taylor instability with double interfaces as the research object,the interface coupling effects in the weakly nonlinear regime are studied numerically.The variation of Atwood numbers on the two interfaces and the variation of the thickness between them are taken into consideration.It is shown that,when the Atwood number on the lower interface is small,the amplitude of perturbation growth on the lower interface is positively related with the Atwood number on the upper interface.However,it is negatively related when the Atwood number on the lower interface is large.The above phenomenon is quantitatively studied using an analytical formula and the underlying physical mechanism is presented.
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| 关 键 词： | Rayleigh–Taylor INSTABILITY WEAKLY nonlinear REGIME numerical simulation |
Interface coupling effects of weakly nonlinear Rayleigh–Taylor instability with double interfaces |
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| Zhiyuan Li,Lifeng Wang,Junfeng Wu,Wenhua Ye.Interface coupling effects of weakly nonlinear Rayleigh–Taylor instability with double interfaces[J].Chinese Physics B,2020(3):318-322. |
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| Authors: | Zhiyuan Li Lifeng Wang Junfeng Wu Wenhua Ye |
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| Affiliation: | Institute of Applied Physics and Computational Mathematics;Center for Applied Physics and Technology |
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| Abstract: | Taking the Rayleigh–Taylor instability with double interfaces as the research object, the interface coupling effects in the weakly nonlinear regime are studied numerically. The variation of Atwood numbers on the two interfaces and the variation of the thickness between them are taken into consideration. It is shown that, when the Atwood number on the lower interface is small, the amplitude of perturbation growth on the lower interface is positively related with the Atwood number on the upper interface. However, it is negatively related when the Atwood number on the lower interface is large.The above phenomenon is quantitatively studied using an analytical formula and the underlying physical mechanism is presented. |
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| Keywords: | Rayleigh–Taylor instability weakly nonlinear regime numerical simulation |
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