地下强爆炸研究牵引的多介质辐射流体力学的可计算建模与计算方法

1996年实现全面核禁试以后，核武器研究对数值模拟提出了新的更高的要求。本项目以地下强爆炸研究为牵引，从基础研究入手，研究爆炸、高速化学反应流场中的可计算建模与高精度高效的自适应非结构网格方法。内容如下：(a) 建立计算量可控的物理性态差异极大的多介质(如气体和岩土)辐射流场的矩(moment)系统框架下的数学模型；(b) 实现物理性态显著不同的多介质辐射流体力学大变形流场的高效耦合计算方法；(c) 开发相应的自适应非结构网格方法的分布式并行软件；(d) 通过地下强爆炸研究的一些基准(benchmark)问题的模拟进行模型和方法的验证。

After the Comprehensive Nuclear Test Ban Treaty was ratified in 1996, even demanding requests on numerical simulation technique are raised by the nuclear weapon study. Starting from basic research, our proposal will develop highly efficient and accurate adaptive unstructured grid methods and computable modeling for the high temperature and high pressure multimedia coupling fluid flows, driven by underground intense explosion. The media under consideration include gases and rocks, with great difference in their physical features. We will conduct our research in:.(a) computable modeling for the multi-media radiation hydrodynamics by using our numerical regularized moment technique;.(b) the high performance coupled numerical methods for multi-media radiation hydrodynamics with large deformation and great physical feature difference;.(c) development of a distributed parallel software with adaptive (unstructured) grid methods for the problems under consideration; and.(d) numerical simulations on several benchmark problems in order to validate our mathematical models and methods.