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首页> 外文会议>Advances in Hydraulics and Water Engineering >NUMERICAL MODELLING OF FLOWS IN VERTICAL SINGLE-SLOT AND DOUBLE-SLOT FISHWAYS
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NUMERICAL MODELLING OF FLOWS IN VERTICAL SINGLE-SLOT AND DOUBLE-SLOT FISHWAYS

机译：垂直单缝和双缝鱼道中水流的数值模拟

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Most of the earlier studies on fishways have been focused on the flow structure by means of hydraulic models. Since the flow structure in a fishway is complicated with free surface and sub- and super-critical flow conditions usually coexist, only a few papers have been published which had applied numerical methods to the flow in fish-ways. This paper deals with applications of a second order accurate Godunov-type numerical model of the two-dimensional shallow water equations discretized using finite volumes to the flow in vertical slot fishways. Roe's approximate Riemann solver is used for the convection terms to calculate the flux through computational cell edge, and a slope limiter is applied to prevent non-physical oscillations. The model is based on hierarchical quadtree grids automatically generated to fit the boundary configuration. The flows in three types (two types for single-slot and one for double-slot) of vertical slot fishway are simulated and discussed.
机译：早期关于鱼道的大多数研究都通过水力模型将重点放在了水流结构上。由于鱼道中的流动结构复杂，并具有自由表面，并且通常同时存在亚临界和超临界流动条件，因此，仅发表了几篇论文，将数值方法应用于鱼道中的流动。本文研究了利用有限体积离散化的二维浅水方程组的二阶精确Godunov型数值模型在垂直缝隙鱼道中的流动。 Roe的近似Riemann求解器用于对流项，以计算通过计算单元边缘的通量，并应用斜率限制器来防止非物理振荡。该模型基于自动生成以适合边界配置的分层四叉树网格。模拟并讨论了三种垂直槽鱼道的水流（单槽两种，双槽两种）。

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