ABSTRACT

In the proposed work, a numerical model of the water flow during dam breakthrough using the volume of fluid (VOF) method is constructed. The mathematical model consists of a system of Navier–Stokes equations, and also includes equations for the phase and motion of particles. For the simulation, the SST k−ω turbulent model was used. To solve the system of equations, the PISO algorithm was used. The reliability and accuracy of the developed 3D model were validated using a laboratory experiment on the problem of dam-break. The obtained results of the problem were compared with the calculations of other authors and with experimental data. The comparisons show good consistency and generally yielded positive results. Also in this work, the natural mudflow was maximally close to reality: with the presence of both deposits of mud mass and imitating particles and dam fragments of particles in an obstacle of a trapezoidal shape.

摘要

在所提议的工作中，使用流体体积（VOF）方法构建了大坝突破期间水流的数值模型。数学模型由 Navier-Stokes 方程组组成，还包括粒子的相位和运动方程。对于模拟，SST k - ω使用了湍流模型。为了求解方程组，使用了 PISO 算法。所开发的 3D 模型的可靠性和准确性通过关于溃坝问题的实验室实验进行了验证。将得到的问题结果与其他作者的计算和实验数据进行了比较。比较显示了良好的一致性，并且通常产生了积极的结果。同样在这项工作中，自然泥流最大程度地接近现实：在梯形形状的障碍物中既有泥块沉积物，也有模拟颗粒和颗粒坝碎片。