教授 博士生导师 硕士生导师
性别: 男
出生日期: 1955-05-06
毕业院校: 江苏工学院
学位: 学士
所在单位: 力学与航空航天学院
学科: 流体力学. 计算力学. 航空航天力学与工程. 飞行器设计
办公地点: 大连理工大学综合实验一号楼415室
联系方式: cjwudut@dlut.edu.cn或cj_wu@163.com
电子邮箱: cjwudut@dlut.edu.cn
学术主页: : http://202.118.74.190/~cjwu/
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论文类型: 期刊论文
发表时间: 2016-11-01
发表刊物: SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
收录刊物: SCIE、EI、Scopus
卷号: 59
期号: 11
ISSN号: 1674-7348
关键字: optimal dynamical systems; helical-wave decomposition; fundamental elements of turbulence; vortex structures
摘要: In this paper, we present the theory of constructing optimal generalized helical-wave coupling dynamical systems. Applying the helical-wave decomposition method to Navier-Stokes equations, we derive a pair of coupling dynamical systems based on optimal generalized helical-wave bases. Then with the method of multi-scale global optimization based on coarse graining analysis, a set of global optimal generalized helical-wave bases is obtained. Optimal generalized helical-wave bases retain the good properties of classical helical-wave bases. Moreover, they are optimal for the dynamical systems of Navier-Stokes equations, and suitable for complex physical and geometric boundary conditions. Then we find that the optimal generalized helical-wave vortexes fitted by a finite number of optimal generalized helical-wave bases can be used as the fundamental elements of turbulence, and have important significance for studying physical properties of complex flows and turbulent vortex structures in a deeper level.