Hydrodynamic transitions to chaos in the convection of an anisotropic fluid
Hydrodynamic transitions to chaos in the convection of an anisotropic fluid
复制标题
各向异性流体对流中的流体动力学转变为混沌
DOI:
10.1051/jphys:01986004704059500
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发表时间:
1986
期刊:
影响因子:
--
通讯作者:
R. Ribotta
中科院分区:
文献类型:
--
作者:
A. Joets;R. Ribotta
We present the first spontaneous sequence of hydrodynamic instabilities due to the evolution of the convective flow from the rest state toward chaos in an anisotropic fluid: a nematic liquid crystal subjected to an AC electric field. The resulting structures are of decreasing symmetry as the control parameter is gradually increased. The study of the streamlines allows the interpretation of the entire sequence by the evolution of the convective flow up to the onset of chaos. We show that the first important step in the flow evolution is the build up of a second mode of rotation which is associated with a pinching instability of the vortex lines. A simple picture is then proposed in order to describe the essential steps of a possible route to chaos, and which could be extended to other convective systems On presente une suite ordonnee d'instabilites hydrodynamiques d'un ecoulement convectif, observees depuis l'etat de repos jusqu'au chaos dans un cristal liquide soumis a un champ electrique