Bandyopadhyay R, Basappa G, Sood A K
Department of Physics, Indian Institute of Science, Bangalore 560 012, India.
Phys Rev Lett. 2000 Feb 28;84(9):2022-5. doi: 10.1103/PhysRevLett.84.2022.
The nonlinear flow behavior of a viscoelastic gel formed due to entangled, cylindrical micelles in aqueous solutions of the surfactant cetyl trimethylammonium tosilate (CTAT) has been studied. On subjecting the system to a step shear rate lying above a certain value, the shear and normal stresses show interesting time dependent behavior. The analysis of the measured time series shows the existence of a finite correlation dimension and a positive Lyapunov exponent, unambiguously implying that the dynamics can be described by that of a dynamical system with a strange attractor whose dimension increases with the increase in shear rate.
在表面活性剂十六烷基三甲基铵对甲苯磺酸盐（CTAT）的水溶液中，由缠结的圆柱形胶束形成的粘弹性凝胶的非线性流动行为已得到研究。当使该系统经受高于某一值的阶跃剪切速率时，剪切应力和法向应力呈现出有趣的时间依赖性行为。对测量的时间序列的分析表明存在有限的关联维数和正的李雅普诺夫指数，明确暗示该动力学可以由具有奇异吸引子的动力系统的动力学来描述，其维数随剪切速率的增加而增加。
