摘要
ELCIRC河口模型优点之一是水平法向速度的全导数采用逆向追踪计算。这种欧拉-拉格朗日模拟必须采用精确的追踪算法。就ELCIRC现有模型中插值方法的双线性映射误差进行了一定的讨论,给出另外一种较为简化的迭代算法。通过弯道水槽算例分析可知,迭代算法在计算精度和计算有效性上与原有的程序基本一致。
The numerical algorithm of ELCIRC （ Eulerian-Lagrangian CIRCulation） has an important advantage ： the total derivatives of the horizontal normal velocity are discretized using Lagrangian back-tracking. The use of accu-rate tracking algorithms is strongly recommended for this Eulerian-Lagrangian simulation. Tracking errors in inverse bilinear mapping for quadrangles is discussed and a more simple iterative method is recommended. A calculation example of bend flume shows that this iterative method has the same accuracy and computational efficiency.with the original method.
出处
《长江科学院院报》
CSCD
北大核心
2013年第6期99-102,共4页
Journal of Changjiang River Scientific Research Institute
基金
国家自然科学基金面上项目(51079008)
