arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1704.08024physics.flu-dynphysics.ao-phphysics.class-ph
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关于浅水浊流的模拟

On the modelling of shallow turbidity flows

Valery Liapidevskii, Denys Dutykh, Marguerite Gisclon

摘要:

本研究从力学观点探讨浅水浊流密度流与底流。我们提出了一个简单的双曲线模型,这样的流量。一方面,我们的模型是基于非常基本的守恒原理。另一方面,通过能量耗散机制也考虑了流动的湍流性质。此外,与纯水的混合以及泥沙的夹带和沉积过程被认为是动态有趣的问题。我们的模型的主要优点之一是,它只需要指定两个建模参数-湍流耗散率和纯水夹带率。因此,由此产生的模型是非常简单和自洽的。通过实验数据验证了该模型的有效性,并构造了几类特殊的解(如行波解、自相似解和稳态解)。非定常仿真表明,某些特殊的解决方案实现的渐近长时间状态的动态轨迹。

英文摘要:

In this study we investigate shallow turbidity density currents and underflows from mechanical point of view. We propose a simple hyperbolic model for such flows. On one hand, our model is based on very basic conservation principles. On the other hand, the turbulent nature of the flow is also taken into account through the energy dissipation mechanism. Moreover, the mixing with the pure water along with sediments entrainment and deposition processes are considered, which makes the problem dynamically interesting. One of the main advantages of our model is that it requires the specification of only two modeling parameters - the rate of turbulent dissipation and the rate of the pure water entrainment. Consequently, the resulting model turns out to be very simple and self-consistent. This model is validated against several experimental data and several special classes of solutions (such as travelling, self-similar and steady) are constructed. Unsteady simulations show that some special solutions are realized as asymptotic long time states of dynamic trajectories.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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