摘要
基于算子分裂,把欧拉方程分裂成对流项和非对流项两部分,建立一种基于原始变量的二阶显隐算法.由通常的虚拟流体方法显式地预估流场,用隐式的压力修正对预估解进行修正.计算结果表明,这样可以有效增大时间步长,提高计算效率.
Based on operator splitting technique, Euler equations is splitted into convection part and non-convection part. A predicted solution is obtained by solving the convection part with explicit GFM method. It is corrected by an implicit pressure correction algorithm derived from the non-convection part. A second order primitive explicit-implicit algorithm is built. It shows that CFL condition can be relaxed and efficiency is improved.
出处
《计算物理》
CSCD
北大核心
2013年第1期27-34,共8页
Chinese Journal of Computational Physics
基金
国家自然科学基金(11126116)
河南理工大学博士基金(B2010-11)资助项目
关键词
虚拟流体方法
显隐算法问题
算子分裂
ghost fluid method
explicit-implicit algorithm
operator splitting
