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冰川冻土  2012 

河冰数值模拟中不规则边界处理技术探讨

, PP. 1353-1357

Keywords: 河冰数值模拟,贴体网格,滑动边界法,水面位置确定,动边界技术

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Abstract:

数值模拟是河冰问题研究的重要手段之一,但受限于天然河道的复杂地形条件,研究工作开展中往往面临不规则边界的处理问题.基于河冰数值模拟工作现状,总结和阐述了贴体网格技术对其的应用.针对二维数值模拟提出了采用滑动边界法和势流理论式相结合的方法来进一步提高边界处网格的正交性;三维网格生成则宜采用σ竖向坐标变换法;河冰模拟中水面位置确定通常采用标高函数法;对于非稳态河冰数值模拟,动边界处理技术可考虑改进并应用干湿法.

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