摘要
针对反应流中刚性化学反应源项传统算法计算量大的特点,提出加速化学反应计算速度的动态数据表存储/删除算法,在二维气相爆轰的数值模拟中进行检验,研究节点删除和整体删除两种不同方式的效果,并与传统直接积分的算法进行比较.计算结果表明,该算法既可以很好地满足计算精度的要求,同时也对计算机内存没有苛刻的要求.当数据表数据容量一定时,计算的加速比随控制容差的增加而增加,在相同的容差条件下,节点删除算法比整体删除算法加速效果明显.并且在处理瞬态反应流问题时显示了很好的优越性.
A dynamical storage/deletion algorithm for acceleration of chemical reaction calculation is proposed which deals with stiff chemical source term in reactive flows. The algorithm is applied to two-dimensional gaseous detonation. Two deletion approaches, global deletion and node deletion, are developed and compared with traditional direct integration （DI） algorithm. It shows that the proposed algorithm ensures computational accuracy and relaxes stringent limitation on computer memory. With fixed size of data table, computational speedup factor increases with increament of tolerance error. With same tolerance error, speedup factor of node deletion approach is higher than that of global deletion. The algorithm shows advantages in solving transient reactive flows.
出处
《计算物理》
EI
CSCD
北大核心
2009年第1期27-34,共8页
Chinese Journal of Computational Physics
基金
北京理工大学爆炸科学与技术国家重点实验室开放基金(KFJJ06-3)
总装重点实验室开放基金(9143C3404,06060C3004)资助项目
关键词
化学反应精度和效率
动态存储/删除
爆轰波
数值模拟
accuracy and cffeciency of chemical reactions
dynamical storage/deletion
detonation wave
numerical simuahion
