Monami as an oscillatory hydrodynamic instability in a submerged sea grass bed
Monami as an oscillatory hydrodynamic instability in a submerged sea grass bed
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Monami 作为水下海草床中的振荡流体动力学不稳定性
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
S. Mandre
中科院分区：
文献类型：
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作者：
Ravikant Singh;M. Bandi;A. Mahadevan;S. Mandre
Amala Mahadevan Woods Hole 海洋研究所，Woods Hole MA 02543 USA 摘要 monami 的出现（稳定流驱动的海草床的同步波动）被建模为流动的线性不稳定性。我们的模型处理草施加的阻力，以建立稳定的流动剖面，并抑制对其的扰动。这种阻尼导致不稳定的有限阈值流，这与实验观察结果一致。植被阻力的这种作用使我们的机制与之前的假设不同，即开尔文-亥姆霍兹不稳定性是 monami 的基础。
Amala Mahadevan Woods Hole Oceanographic Institution, Woods Hole MA 02543 USA Abstract The onset of monami – the synchronous waving of sea grass beds driven by a steady flow – is modeled as a linear instability of the flow. Our model treats the drag exerted by the grass in establishing the steady flow profile, and in damping out perturbations to it. This damping leads to a finite threshold flow for the instability, which agrees with experimental observations. This role of vegetation drag differentiates our mechanism from the previous hypothesis that the Kelvin-Helmholtz instability underlies monami.