摘要
本文用拟谱方法对随时间发展的二维粘弹性二阶流体混合层流场进行了直接数据值模拟，给出在高雷诺数和低Ｄｅｂｏｒａｈ数下大涡的卷起、配对和合并等过程，通过与相同雷诺数下牛顿流体的比较，揭示了弱粘弹性对混合层中大涡拟序结构演变的影响·
umerical simulations have been performed in time-developing plane mixing layers of the viscoelastic second-order fluids with pseudo-spectral method. Roll-up, pairing and merging of large eddies were examined at high Reynolds numbers and low Deborah numbers. The effect of viscoelastics on the evolution of the large coherent structure was shown by making a comparison between thesecond-order and Newtonian fluids at the same Reynolds numbers.
出处
《应用数学和力学》
CSCD
北大核心
1998年第8期671-677,共7页
Applied Mathematics and Mechanics
基金
国家自然科学基金
关键词
数值模拟
拟序结构
粘弹性流体
混合层流场
mixing layer, viscoelastic second-order fluids, numerical simulation, pseudo-spectral method, coherent structure
