In this study, the effect of the geometry modification in the physical model (step height) on flow factors in the stilling basin is investigated numerically. The Navier–Stokes equations were used to solve the flow field; the Reynolds stress turbulence model was used to model Reynolds stresses, and the volume of fluid method was used to determine the surface flow profile. Momentum and turbulence equations have been solved by the finite volume method. The results indicate that when the height of the steps in the stilling basin increases, the flow depth increases, and eventually the flow velocity decreases. When the height of the steps decreases, the flow velocity increases, and the flow depth decreases. The results of the numerical model are in good enough agreement with experimental results.

中文翻译：

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使用VOF方法改变阶梯式溜槽的最终台阶高度对消静盆中流动剖面的影响

在这项研究中，数值研究了物理模型中的几何形状修改（台阶高度）对消融盆中流动因子的影响。Navier-Stokes方程用于求解流场。使用雷诺应力湍流模型对雷诺应力进行建模，并使用流体体积法确定表面流动剖面。动量和湍流方程已通过有限体积法求解。结果表明，当消沉盆中台阶的高度增加时，流动深度增加，最终流速降低。当台阶的高度减小时，流速增加，并且流动深度减小。数值模型的结果与实验结果足够吻合。