界面曲率效应对Richtmyer-Meshkov不稳定性（RMI）问题中的界面扰动发展规律有显著影响。深入研究界面曲率效应对扰动增长的促进或抑制机制、厘清复杂物理过程中曲率效应与多种其他机制的耦合、探索主动控制扰动增长和混合速率的方式方法，对解决惯性约束核聚变等工程应用中的界面失稳问题具有指导意义。本申请将进一步发展数值模拟方法，增强对间断面的捕捉能力和对极端苛刻环境的复现能力，研究平面激波冲击下界面曲率效应对扰动发展的影响以及汇聚激波冲击下曲率效应与模态竞争、Bell-Plesset、Rayleigh-Taylor效应、多界面扰动反馈等其他多物理机制的耦合，建立和完善界面扰动发展的理论模型，探索通过初始界面形式设计来控制扰动增长和流体混合程度的方式方法。本项目有望在RMI基础研究方面获得深入认识，为流动不稳定性的实际应用与控制提供指导。

The interface curvature effect plays a significant role in affecting the three-dimensional Richtmyer-Meshkov instability (RMI) perturbation growth. It is of great importance to discover the mechanism that the curvature effect exerts on enhancing or suppressing the perturbation growth, to clarify the coupling correlations between the curvature effect and any other physical effects in complex RMI procedures, and to explore methods to control the perturbation growth and mixing rate. They would be helpful for tackling the interface instability difficulties in the Inertial Confinement Fusion facilities. This application is going to further develop the in-house numerical tools, strengthen the abilities of capturing discontinuities and reproducing extremely harsh conditions so as to investigate (a) the effect of curvature on the perturbation growth under planar shock impact and, (b) the coupling correlation between the curvature effect and any other physical effects (mode competition, Bell-Plesset, Rayleigh-Taylor, multilayer feedback) under converging shock impact. Based on these investigations, a more complete theory model could be established and the means to actively control the perturbation growth and fluids mixing through the initial interface design could be developed. The present project will bring deep insight into the RMI fundamentals, provide guidance for the practical application and active control of the flow instabilities.