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一类Lagrange坐标系下的ENO有限体积格式
A KIND OF ESSENTIALLY NON-OSCILLATORY FINITE VOLUME SCHEME IN LAGRANGIAN COORDINATE
【摘要】 本文首先从积分形式的二维Lagrange流体力学方程组出发,使用ENO高阶插值多项式,推广了四边形结构网格下的一阶有限体积格式,构造得到了一类结构网格下的高精度有限体积格式.该格式针对单介质问题具有良好的计算效果,同时在处理多介质问题时,不会产生物质界面附近强烈的震荡.结合有效的守恒重映方法,用ALE方法进行数值模拟,得到了预期的效果.
【Abstract】 In this paper,a new kind of finite volume scheme is developed for Lagrangian equations of hydrodynamics.By use of ENO (Essentially Non-oscillatory) interpolating polynomials on structure grids,the high accurate finite volume scheme has been constructed by modifying a first order finite volume scheme on rectangular mesh.This scheme not only does well in single material calculations,but also eliminates the oscillations due to common conservative scheme in multimaterial calculations.Finally,with the remapping method,some numerical experiments are made with an arbitrary Lagrangian-Eulerian method and results show that the method is effective.
【Key words】 remapping technique; ALE method; ENO interpolation; finite volume scheme; Lagrangian coordinate;
- 【文献出处】 数值计算与计算机应用 ,Journal on Numerical Methods and Computer Applications , 编辑部邮箱 ,2007年04期
- 【分类号】O35
- 【被引频次】2
- 【下载频次】141