对流状态的向列相液晶向湍流转变的流体动力学研究

对流状态的向列相液晶向湍流转变的流体动力学研究 HYDRODYNAMIC TRANSITIONS TO TURBULENCE IN THE CONVECTION OF A NEMATIC LIQUID CRYSTAL 杨宣东 Yang Xuandong Hu Xiuyu 1 2 first-author 胡修愚 1 2 R.RIBOTTA 1 2 A.JOETS 1 2 武汉大学物理系 武汉大学物理系 Departement of Physics, Wuhan University) R.Ribotta A. Joets Departement of Physics, Wuhan University) R.Ribotta A. Joets Laboratoire de Physique des Solides Universite de Paris,Sud Laboratoire de Physique des Solides Universite de Paris,Sud 本文研究了对流状态的向列相液晶向湍流转变的流体动力学,并指出最重要的转变阶段对应于新的对流旋转方式出现在对流滚筒的箍缩畸变处。我们提出了向湍流转变的各个阶段的简明描述,这有可能推广到其他的对流体系。 We study the hydrodynamic transitions to turbulence in the convection of a nematic liquide crystal, we show that the first important in the flow evolu-tion is the build up of a new mode of rotation which is associated with a pinching instability of the vortex lines. A simple picture is them proposed in order to describe the essential steps of a possible route to turbulence, and which could be extended to other convective systems. 向列相液晶 对流滚筒 湍流 转变 流体动力学 旋转矢量 箍缩畸变 1989-03-01 2021-04-01 3