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首页> 外文期刊>Journal of Hydroinformatics >A one-dimensional semi-implicit finite volume modeling of non-inertia wave through rockfill dams
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A one-dimensional semi-implicit finite volume modeling of non-inertia wave through rockfill dams

机译：通过堆石坝的非惯性波的一维半隐性有限体积建模

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摘要

For hydraulic routing through coarse rockfill dams, there is still debate on whether the inertia terms might be neglected as a result of the drag force generated by the rock materials. In this study, a one-dimensional unsteady model for flow-through rockfill dams is built. For this purpose, inertia terms of Saint–Venant equations are disregarded. A semi-implicit scheme adopted for linearizing the nonlinear friction term within the time integration satisfies the Courant–Friedrich–Lewy stability criterion. The most challenging issue in the modeling of flows through rockfill dams is the appropriate definition of boundary conditions at the dam's exit zone. In addition to the analysis of different exit boundary conditions proposed in the literature, a Neumann-type boundary condition suitable for the non-inertia wave equation is also employed to estimate the exit boundary condition. This procedure is basically in appreciation of the nonlinear behavior of the water surface closer to the exit boundary. Due to the existence of the sloping edges in the trapezoidal-shaped dam, an effective length is considered for the solution domain. Finally, the model is compared with observed data and a dynamic wave model. A very good match is observed, which builds confidence in the presented modeling approach.
机译：对于通过粗大堆石坝的液压布线，仍然可以争论是否由于岩石材料产生的阻力而易于忽略惯性术语。在本研究中，建立了用于流通堆石坝的一维不稳态模型。为此，忽略了圣腔方程的惯性方程。采用用于线性化非线性摩擦术语的半隐含方案满足了傅立兽 - 弗里希氏稳定性标准。通过堆石坝流动建模中最具挑战性的问题是大坝出口区的边界条件的适当定义。除了在文献中提出的不同出口边界条件的分析之外，还采用适用于非惯性波方程的Neumann型边界条件来估计出口边界条件。该过程基本上升高了水表面更靠近出口边界的非线性行为。由于梯形形坝中的倾斜边缘存在，考虑溶液结构域的有效长度。最后，将模型与观察到的数据和动态波模型进行比较。观察到一个非常好的比赛，这在呈现的建模方法中建立了信心。

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