摘要
提出“准衰退记忆”新概念,发展了非牛顿流体扰动本构理论,并研究了粘弹流体拉伸流动的不稳定性规律。
In the present paper a concept of 'quasi-short memory' is introduced instead of 'short memory' in order to develop a theory for disturbed constitutive equation for the basic flow of non-Newtonian fluids. The constitutive equation is derived for general basic flow and rheological models. The constitutive equation of second order for disturbed extensional flow is used to study the instability of stretching sheet of viscoelastic fluid. The instability criterion is given for general rheological model and the application is given for the upper-convected Maxwell model.
出处
《力学学报》
EI
CSCD
北大核心
1993年第2期213-217,共5页
Chinese Journal of Theoretical and Applied Mechanics
基金
国家自然科学基金
关键词
粘弹性流动
扰动本构方程
拉伸流动
constitutive theory, extensional flow, viscoelastic fluid