摘要
提出了一种适用于具有复杂海底边界的自由表面流动模拟算法?基于非结构化四边形网格的VOF法。利用非结构化四边形网格在拟合曲线边界上的优势,此法能够在不引入任何边界处理和人工耗散的条件下,直接求解具有任意复杂海底边界的自由表面流动问题。该算法采用MLER法来对流界面,提高了VOF算法的体积守恒精度。大应变界面对流数值实验结果表明,该算法体积守恒性较好,且具有二阶的形状误差收敛率。
A novel VOF method based on unstructured quadrilateral mesh for free-surface flows with complex seabed boundaries is presented. Owning to the inherent merit of unstructured quadrilateral mesh in fitting curved boundaries, this method can handle free-surface problems with complex seabed geometries directly and accurately, without introducing any complicated boundary treatment or artificial diffusion. In this method, the MLER method is applied in advecting fluid volumes on unstructured mesh to improve the algorithm＇s volume conservation capability. Advection tests with large deformations were performed and the results show the method has high volume conservation accuracy and second-order shape error convergence rate.
出处
《港工技术》
北大核心
2008年第2期1-4,共4页
Port Engineering Technology
基金
国家自然科学基金资助项目(50579046
50779043
50779045)
教育部博士基金资助项目(20070056120)
