| 用于ALE有限元模拟的网格更新方法 |
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| 引用本文： | 周宏,李俊峰,王天舒.用于ALE有限元模拟的网格更新方法[J].力学学报,2008,40(2):267-272. |
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| 作者姓名： | 周宏 李俊峰 王天舒 |
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| 作者单位： | 清华大学航天航空学院动力学与控制研究所清华大学航天航空学院,100084清华大学航天航空学院 |
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| 摘 要： | 任意拉格朗日欧拉法(ALE)可以通过定义参考网格的运动，实现自由液面跟踪，完成液体晃动的数值计算. 综合用于更新网格节点的3种基本计算方法，将多方向更新网格速度的技术应用于任意拉格朗日欧拉网格节点的速度计算. 给出了水平圆柱形贮箱和椭圆形贮箱内液体晃动算例，实现了多方向更新网格运动与晃动流场计算的耦合，使ALE方法能胜任复杂几何边界下的自由液面流动的数值模拟.
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| 关 键 词： | ALE方法 有限元方法 网格更新 液体晃动 水平圆柱形贮箱 |
| 文章编号： | 0459-1879（2008）02-0267-06 |
| 收稿时间： | 2007-01-29 |
| 修稿时间： | 2007-12-21 |
MESH UPDATE ALGORITHM IN ALE FINITE METHOD WITHIN FREE SURFACE FLOW |
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| Zhou Hong,Li Junfeng,Wang Tianshu.MESH UPDATE ALGORITHM IN ALE FINITE METHOD WITHIN FREE SURFACE FLOW[J].chinese journal of theoretical and applied mechanics,2008,40(2):267-272. |
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| Authors: | Zhou Hong Li Junfeng Wang Tianshu |
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| Institution: | School of Aerospace, Tsinghua University, Beijing 100084, ChinaSchool of Aerospace, Tsinghua University, Beijing 100084, ChinaSchool of Aerospace, Tsinghua University, Beijing 100084, China |
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| Abstract: | The arbitrary Lagrange-Euler method affords tracking the motion of free interface in liquid slosh problems through defining the nodal velocities of reference frame. Based on reviewing the three elementary algorithms applied in mesh updating, the method that computational nodes can move more than one direction is used in special numerical example. This achievement demonstrates that the ALE method is available for more complex geometrical boundaries. The nodal velocities and mesh configurations during the sloshing in horizontal cylinder are illustrated at the section of nuemerical example. |
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| Keywords: | ALE method finite element method mesh update liquid slosh horizontal cylinder container |
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