Convection patterns in a spherical fluid shell.

Convection patterns in a spherical fluid shell.
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球形流体壳中的对流模式。

DOI:
10.1103/physreve.83.046304
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发表时间:
2011
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
通讯作者:
Feudel F
Feudel F
中科院分区:
--
文献类型:
--
作者:
Feudel F

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研究了外半径为内半径两倍的非旋转球壳中对流的对称破缺分岔,在外力场的径向依赖性与之成正比的作用下,对流的对称破缺分岔。这项工作的动机是GeoFlow实验,该实验是在国际空间站的微重力条件下进行的,在那里可以产生这种特殊的中心力。为了预测可观察到的模式,模拟与路径跟踪技术和稳定性计算已被应用。分支轴对称,八面体,和七细胞的解决方案已被跟踪。产生它们的分叉已被确定,并确定其稳定范围。在较高的瑞利数,时间周期的状态与复杂的时空对称性被发现,我们称之为呼吸模式。
Symmetry-breaking bifurcations have been studied for convection in a nonrotating spherical shell whose outer radius is twice the inner radius, under the influence of an externally applied central force field with a radial dependence proportional to. This work is motivated by the GeoFlow experiment, which is performed under microgravity condition at the International Space Station where this particular central force can be generated. In order to predict the observable patterns, simulations together with path-following techniques and stability computations have been applied. Branches of axisymmetric, octahedral, and seven-cell solutions have been traced. The bifurcations producing them have been identified and their stability ranges determined. At higher Rayleigh numbers, time-periodic states with a complex spatiotemporal symmetry are found, which we call breathing patterns.
具有 O(3) 对称性的跨临界分岔
DOI: 10.1088/0951-7715/16/4/315
发表时间: 2003
期刊: Nonlinearity
影响因子: 1.7
作者:
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发表时间: 1992-03-01
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影响因子: --
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