摘要
本文基于Ｌａｇｒａｎｇｅ法与ＡＥＬ方法的思想推出了一种颇具实用价值的轨迹Ｅｕｌｅｒｉａｎ－Ｌａｇｒａｎｇｉａｎ（ＴＥＬ）型非恒定坐标变换系统，包括边界轨迹ＴＥＬ型非恒定变换与网格轨迹ＴＥＬ型非恒定变换；应用ＴＥＬ型非恒定坐标变换系统推出了带自由表面三维非恒定紊流场的全场数学模型，并通过以孤立波的爬坡计算与带自由表面强弯曲渠道紊流场计算作为实例验证了模型的可行性和有效性。
The Trajectory Eulerian-Lagrangian (TEL) coordinate system was developed by introducing the moving trajectory concept to ALE system basing on the principle of the Lagrangian and the Arbitrary Lagrangian Eulerian (ALE ) methods. The TEL system further brought the Boundary Trajectory Eulerian-Lagrangian (BTEL) unsteady system and the Grid Trajectory Eulerian-Lagrangina(GTEL) unsteady system according to the different trajectory support. The full-field numerical model for three-dimensional unsteady free-surface turbulent flow was also presented by using k-ε turbulence model in the Trajectory Eulerian-Lagrangian(TEL) unsteady system. To verify the applicability, practicality and reliablity, the numerical model was applied in the unsteady flow field prediction for solitary wave propagation and the calculation of strongly curved open channel free-surface flow.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
1995年第5期501-509,共9页
Chinese Journal of Hydrodynamics
基金
大连理工大学海岸资助
近海工程国家重点实验室基金
关键词
紊流
数值模型
自由表面
坐标系
turbulent flow
numerical model
free surface
coordinate system
