长江科学院院报 ›› 2013, Vol. 30 ›› Issue (6): 99-102.DOI: 10.3969/j.issn.1001-5485.2013.06.022

• 科技简报 • 上一篇    

ELCIRC模型逆向追踪插值初步分析

杨飞1,杨文俊1,王丽华2   

  1. 1.长江科学院 水利部江湖治理与防洪重点实验室,武汉430010; 2.重庆市武隆县水务局,重庆408500
  • 收稿日期:2012-05-17 修回日期:2013-06-04 出版日期:2013-06-04 发布日期:2013-06-04
  • 作者简介:杨飞(1985-),男,山东泰安人,硕士研究生,从事水力学及河流动力学方面的研究,(电话)13810609717(电子信箱)yangfeihaoyun@163.com
  • 基金资助:
    国家自然科学基金面上项目

Preliminary Analysis of Back tracking Interpolation in ELCIRC Model

YANG Fei1, YANG Wen jun1, WANG Li hua2   

  1. 1.Key Laboratory of Flood Control and River & Lake Regulation, Yangtze River Scientific Research Institute, Wuhan 430010, China;
    2.Water Affairs Bureau of Wulong County Chongqing City, Chongqing 408500,China
  • Received:2012-05-17 Revised:2013-06-04 Online:2013-06-04 Published:2013-06-04

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。

关键词: ELCIRC, 双线性映射, 误差, 欧拉-拉格朗日模拟, 逆向追踪

Abstract: 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 accurate 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.

Key words: ELCIRC, bilinear mapping, error, Eulerian Lagrangian simulation, back tracking

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