Convectons, anticonvectons and multiconvectons in binary fluid convection

被引:48
作者
Mercader, Isabel [1 ]
Batiste, Oriol [1 ]
Alonso, Arantxa [1 ]
Knobloch, Edgar [2 ]
机构
[1] Univ Politecn Cataluna, Dept Fis Aplicada, ES-08034 Barcelona, Spain
[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
基金
美国国家科学基金会;
关键词
bifurcation; buoyancy-driven instability; double diffusive convection; LOCALIZED STATES; TRAVELING-WAVES; BIFURCATIONS; SYMMETRY; LADDERS; SNAKES;
D O I
10.1017/S0022112010004623
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
Binary fluid mixtures with a negative separation ratio heated from below exhibit steady spatially localized states called convectons for supercritical Rayleigh numbers. Numerical continuation is used to compute such states in the presence of both Neumann boundary conditions and no-slip no-flux boundary conditions in the horizontal. In addition to the previously identified convectons, new states referred to as anticonvectons with a void in the centre of the domain, and wall-attached convectons attached to one or other wall are identified. Bound states of convectons and anticonvectons called multiconvecton states are also computed. All these states are located in the so-called snaking or pinning region in the Rayleigh number and may be stable. The results are compared with existing results with periodic boundary conditions.
引用
收藏
页码:586 / 606
页数:21
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