摘要
在张涵信提出的无波动、无自由参数的差分格式（ＮＮＤ格式）的基础上，构造了适用于非结构网格的二阶精度ＮＮＤ有限体积格式，解决了现有非结构网格方法中为抑制激波附近的波动而必须引入含自由参数的人工粘性项的困难，并采用网格自适应技术以提高效率．通过对二维平板激波反射和前台阶在管道内的流动问题的计算，表明本方法可有效地用于Ｅｕｌｅｒ方程的求解．
A second order cell-centered NND finite volume algorithm on unstructured triangular grids is presented for solving the Euler equations.A self-adaptive mesh technique is employed to improve the efficiency of the calculation.Two examples,shock reflection from a wall and flow in ZD wind tunnel with a step,are solved, and the results show that the present algorithm possesses good stability characteristics and capability of capturing the shock waves.
出处
《力学学报》
EI
CSCD
北大核心
1996年第2期135-142,共8页
Chinese Journal of Theoretical and Applied Mechanics
关键词
非结构网格
NND格式
N-S方程
finite volume method,unstructured grids, self-adaptive mesh,Euler equations,NND scheme
