Bifurcation of the Ostwald-Liesegang supersaturation-nucleation-depletion cycle *
Bifurcation of the Ostwald-Liesegang supersaturation-nucleation-depletion cycle *
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Ostwald-Liesegang 过饱和-成核-耗尽循环的分叉 *
DOI：
10.1016/0012-8252(0)90034-s
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发表时间：
1990
影响因子：
12.1
通讯作者：
P. Tartaglia
中科院分区：
文献类型：
--
作者：
R. Sultan;P. Ortoleva;F. Depasquale;P. Tartaglia
采用一种新的奥斯特瓦尔德过饱和-成核-贫化循环公式来模拟岩石中的沉淀条带。在一个特殊的限制情况下，该系统被示出为支持传播稳定的沉积脉冲。存在的极限是确定分析一个简单的模型模拟的黄铁矿/针铁矿系统。使用数值模拟，得到一个不稳定的脉冲的矿物沉积，并开发各种模式与适当的系统参数的变化，显然表明，分析得到的稳定脉冲是不稳定的。确定了非定常脉冲、波动图案和离散带的存在域。
A new formulation of the Ostwald supersaturation-nucleation-depletion cycle is adopted to model precipitate banding in rocks. In a special limiting case, the system is shown to support a propagating steady deposition pulse. The limit of existence is determined analytically for a simple model analogue of a pyrite/goethite system. Using numerical simulations, an unsteady pulse of mineral deposition is obtained and is shown to develop a variety of patterns with an appropriate change in the system parameters-apparently showing that the steady pulse obtained analytically is unstable. The domains of existence of unsteady pulse, undulatory patterns and discrete bands are determined.