Stable and unstable pulses of traveling-wave convection.
Stable and unstable pulses of traveling-wave convection.
复制标题
行波对流的稳定和不稳定脉冲。
DOI：
10.1103/physreva.43.2827
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Kolodner
中科院分区：
文献类型：
--
作者：
Kolodner
最近在分离比 \ensuremath{\psi} 为中等负值的二元流体中进行的一维对流实验揭示了行波的空间局部“静止脉冲”的存在，其空间形状和长度是固定的。在长系统中，该脉冲在起始点稍稍被对流放大的波动所破坏。然而，在短系统中，这些波动被抑制，从而允许观察脉冲状态的不稳定延伸。与稳态脉冲不同，这种“不稳定脉冲”可以有任意长度。
Recent experiments on one-dimensional convection in binary fluids at moderate negative values of the separation ratio \ensuremath{\psi} have revealed the existence of a spatially localized ``stationary pulse'' of traveling waves whose spatial shape and length are fixed. In a long system, this pulse is destroyed slightly above onset by convectively amplified fluctuations. In a short system, however, these fluctuations are suppressed, allowing the observation of the unstable extension of the pulse state. Unlike the stationary pulse, this ``unstable pulse'' can have any length.