A numerical study of baroclinic chaos
A numerical study of baroclinic chaos
复制标题
斜压混沌的数值研究
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
J. Hart
中科院分区：
文献类型：
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作者：
A. Yoshida;J. Hart
摘要利用数值模式研究了两层斜压周向流中各种周期性与混沌性态之间的转换。在小的超临界F − Fc和低摩擦力Γ下，发现了一种类似于低阶或弱非线性模型预言的混沌，然而，与这些相对简单的模型预言相反，这种由E. N.洛伦兹在他对热对流的经典研究中，只占据了F − Γ参数空间中的一个小气泡。随着超临界性的增加，非周期状态突然终止，一个宽的周期运动带将弱非线性混沌区域与在较大F − F c时发生的高维混沌分开。计算与实验定性一致，特别是在中等F − F c，作为Γ...
Abstract A numerical model is used to study the transition between various types of periodic and chaotic behavior in a two-layer baroclinic circumferential flow. At small supercriticality F − F c and low friction Γ, a type of chaos similar to that predicted by low-order or weakly-nonlinear models is found. However, contrary to the predictions of these relatively simple models, this type of aperiodic behavior, first discovered by E. N. Lorenz in his classic study of thermal convection, occupies only a small bubble in the F − Γ parameter-space. As the supercriticality is increased the aperiodic regime terminates abruptly and a broad band of periodic motions separates the weakly-nonlinear chaotic region from a higher-dimensional type of chaos that occurs at larger F − F c Wave-wave vacillation is predicted near the crossing of the wavenumber −1 and wavenumber −2 neutral curves. The calculations are in qualitative agreement with experiments, especially in that the transition to chaos at moderate F − F c, as Γ...