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.
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.
作者
Zhiyuan Li
Lifeng Wang
Junfeng Wu
Wenhua Ye
李志远;王立锋;吴俊峰;叶文华(Institute of Applied Physics and Computational Mathematics,Beijing 100094,China;Center for Applied Physics and Technology,HEDPS,and College of Engineering,Peking University,Beijing 100871,China)
基金
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)。
