Getling A V, Brausch O
Institute of Nuclear Physics, Lomonosov Moscow State University, 119992 Moscow, Russia.
Phys Rev E Stat Nonlin Soft Matter Phys. 2003 Apr;67(4 Pt 2):046313. doi: 10.1103/PhysRevE.67.046313. Epub 2003 Apr 29.
The evolution of three-dimensional, cellular convective flows in a plane horizontal layer of a Boussinesq fluid heated from below is studied numerically. Slow motion in the form of a spatially periodic pattern of hexagonal cells is introduced initially. In a further development, the flow can undergo a sequence of transitions between various cell types. The features of the flow evolution agree with the idea of the flow seeking an optimal scale. In particular, two-vortex polygonal cells may form at some evolution stages, with an annular planform of the upflow region and downflows localized in both central and peripheral regions of the cells. If short-wave hexagons are stable, they exhibit a specific, stellate fine structure.
对底部加热的布辛涅斯克流体水平平面层中三维细胞对流流动的演化进行了数值研究。最初引入以六边形细胞的空间周期性模式形式存在的缓慢运动。在进一步发展中，流动可以经历各种细胞类型之间的一系列转变。流动演化的特征与流动寻求最佳尺度的观点一致。特别是，在某些演化阶段可能会形成双涡多边形细胞，其上升流区域具有环形平面形状，下降流位于细胞的中央和周边区域。如果短波六边形是稳定的，它们会呈现出一种特定的星状精细结构。
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