两介质流界面-激波相互作用RKDG方法应用分析  

The application and analysis of Runge-Kutta discontinuous Galerkin method for shock interaction with two-medium interface flow

作　　者：冯峰[1] 王强[1] 

机构地区：[1]中国航天空气动力技术研究院,北京100074

出　　处：《计算力学学报》2012年第2期255-261,共7页Chinese Journal of Computational Mechanics

摘　　要：为精确模拟多介质流界面运动现象,采用RKDG方法结合虚拟流体方法对气-气、气-液和液-气等多种界面-激波相互作用问题展开研究。数值结果表明,RKDG方法的时空高精度特征使其能够精确、稳健地求解各种复杂界面运动问题。最后,对水下激波自由面折射问题用多种DG格式限制器进行了计算,对比了它们的间断捕捉能力。In order to simulate the compressible two-medium flow in high accuracy,the Runge-Kutta discontinuous Galerkin（RKDG） method combining the ghost fluid method has been applied to gas-gas/gas-liquid interface interaction with shock in this paper.The numerical results indicate that the RKDG method is a high order scheme in both temporal and spatial discretization.This method deals with multi-medium complex flow accurately and robustly.Several limiters of the discontinuous Galerkin（DG） method have been used to compute underwater shock refracting at a free surface,and the characteristic behaviors of these limiters have been analyzed in the end.

关 键 词：RKDG 虚拟流体方法 界面运动 限制器 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程] O357.4[理学—流体力学]