Hydrodynamic-Driven Stability Analysis of Morphological Patterns on Stalactites and Implications for Cave Paleoflow Reconstructions
Hydrodynamic-Driven Stability Analysis of Morphological Patterns on Stalactites and Implications for Cave Paleoflow Reconstructions
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DOI：
10.1103/physrevlett.108.238501
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发表时间：
2012-06-08
影响因子：
8.6
通讯作者：
Ridolfi, Luca
中科院分区：
文献类型：
--
作者：
Camporeale, Carlo;Ridolfi, Luca
提出了一种新的水动力驱动的稳定性分析的表面图案的洞穴，即，次生沉积洞穴沉积，通过耦合流体动力学的方解石沉淀或溶解的地球化学。降膜理论提供了流场和深度扰动的解决方案，后者对于触发称为锯齿的图案至关重要。在很宽的雷诺数范围内，该模型提供了主导波长和模式速度，在公平的协议与现场数据。分析的相速度的脊上的洞穴沉积物有可能作为代理过去的薄膜流速，从而提出了一个新的支持古气候分析。
A novel hydrodynamic-driven stability analysis is presented for surface patterns on speleothems, i.e., secondary sedimentary cave deposits, by coupling fluid dynamics to the geochemistry of calcite precipitation or dissolution. Falling film theory provides the solution for the flow-field and depth perturbations, the latter being crucial to triggering patterns known as crenulations. In a wide range of Reynolds numbers, the model provides the dominant wavelengths and pattern celerities, in fair agreement with field data. The analysis of the phase velocity of ridges on speleothems has a potential as a proxy of past film flow rates, thus suggesting a new support for paleoclimate analyses.