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| Rayleigh-Taylor不稳定性的Runge-Kutta间断有限元模拟 | |
| 引用本文： | 陈二云,乐贵高,马大为,赵改平,赵继永.Rayleigh-Taylor不稳定性的Runge-Kutta间断有限元模拟[J].高压物理学报,2008,22(3). |
| 作者姓名： | 陈二云 乐贵高 马大为 赵改平 赵继永 |
| 作者单位： | 1. 南京理工大学机械工程学院,江苏南京,210094 2. 上海理工大学医疗器械学院,上海,200093 3. 南京理工大学机械工程学院,江苏南京,210094;常州轻工职业技术学院,江苏常州,213000 |
| 基金项目： | 上海市高校优秀青年教师后备人选科研项目，博士科研启动费基金 |
| 摘 要： | 采用发展后的间断有限元方法,对Rayleigh-Taylor不稳定性进行了数值模拟。在计算中采用Level-Set方法进行界面追踪，用虚拟流体方法（Ghost Fluid Method，GFM）对界面附近物理量进行等压装配。对两个典型的Rayleigh-Taylor不稳定性算例的数值研究结果表明，采用该方法计算含有接触间断的多介质流体力学问题是有效的，在交界面附近不出现伪振荡，具有较高的分辨率。 |
| 关 键 词： | Rayleigh-Taylor不稳定性 间断有限元 Level-Set方法 虚拟流体方法 |
| 收稿时间： | 2007-08-12; |
Numerical Simulation for Rayleigh-Taylor Instability Using Runge-Kutta Discontinuous Finite Element Method |
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| CHEN Er-Yun,LE Gui-Gao,MA Da-Wei,ZHAO Gai-Ping,ZHAO Ji-Yong.Numerical Simulation for Rayleigh-Taylor Instability Using Runge-Kutta Discontinuous Finite Element Method[J].Chinese Journal of High Pressure Physics,2008,22(3). | |
| Authors: | CHEN Er-Yun LE Gui-Gao MA Da-Wei ZHAO Gai-Ping ZHAO Ji-Yong |
| Institution: | 1.School of Mechanical Engineering;Nanjing University of Science and Technology;Nanjing 210094;China;2.School of Medical Instrument;Shanghai University of Science and Technology;Shanghai 200093;3.Changzhou Institute of Light Industry;Changzhou 213000;China |
| Abstract: | Rayleigh-Taylor instability problem is simulated by using discontinuous finite element method which is developed for Euler equations with an additional body force corresponding to the gravity.Level set method for capturing moving interfaces and ghost fluid method with Isobaric fix for disposing the interfaces are used.Through two representative numerical examples of Rayleigh-Taylor instability,it can be concluded that this method has capability to solve multi-media fluid problems including contact discontin... |
| Keywords: | Rayleigh-Taylor instability discontinuous finite element Level-Set method ghost fluid method |
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