摘要
将比例边界坐标插值方法引入谱元法,构成比例边界谱单元;为了增加计算的稳定性,将节点布置在单元内部;用若干无限谱元离散计算域,用间断有限元方法对无穷域Euler方程亚音速圆柱绕流问题进行了数值模拟;计算结果的误差很小,显示了计算方法的可行性.
A new infinite element, by combining the scaled boundary coordinate interpolation method and spectral element method, named scaled boundary spectral element to solve Eu- ler equations over infinite domains directly is presented. In order to guarantee the numerical stability, the nodes are arranged within the elements. By the discretion of the computation- al domains with some infinite elements, we simulate numerically the subsonic flows over a circular cylinder based on the scaled boundary discontinuous spectral element method. The error of calculation is very small, which shows the feasibility of this numerical method.
出处
《数值计算与计算机应用》
CSCD
2014年第1期46-52,共7页
Journal on Numerical Methods and Computer Applications
关键词
比例边界
谱元法
无穷域
EULER方程
间断Galerkin
the scaled boundary
the spectral element method
infinite domains
Eulerequations
discontinuous Galerkin method
