摘要
求解 Navier- Stokes方程组 ,一直是粘性流动计算的主导途径。但在计算中 ,都是在一定的网格单元上进行离散 ,而对不同的离散单元 ,流动的特征并不相同。本文通过离散单元上网格雷诺数的变化分析 ,采用耦合离散流体理论 (CDFT)差分格式 ,对向后台阶底部超声速流动问题进行数值模拟 ,得到了满意的结果。
The flow characteristics in different cells are different due to nonuniformity of viscous flows. The differences of flow characteristics are shown in various computational parameters. For example, there often exist quite large quantitative difference between the grid Reynolds numbers R Δx i of not only in the different cells but also in the different coordinate directions of the same cell. In this paper, we based on the analysis of the grid Reynolds numbers R Δ x i , applied the couple discrete fluid theory (CDFT) to practical computation, simulated the supersonic separated flows of rearward\|facing step and got some meaningful results.
出处
《计算力学学报》
CAS
CSCD
2000年第4期385-389,共5页
Chinese Journal of Computational Mechanics
基金
国家自然科学基金项目
中国科学院力学所所长择优基金项目
高温气体动力学开放实验室
科学与工程计算国家重点实验室资助
