论文部分内容阅读
为提高计算精度,研究简单和复杂边界情况下交错网格和同位网格平面二维水流模型的收敛性。采用有限体积法离散正交曲线坐标下的控制方程,使用S IM PLEC方法求解水位。比较水流动能、最大水位修正和剩余质量源随迭代的变化过程。结果表明:1)在简单边界条件下,交错网格模型收敛性较好;2)在复杂边界条件下,两套网格模型收敛性基本相同。在恒定流计算过程中采用动能标准比最大水位修正和剩余质量标准更能有效地判别模型的稳定性。
In order to improve the computational accuracy, the convergence of two-dimensional flow model of staggered grid and co-located grid in the case of simple and complex boundaries is studied. The governing equations under the discrete volumetric method of orthogonal curvilinear coordinates are used and the S IM PLEC method is used to solve the water level. Compare the changes of water flow kinetic energy, maximum water level correction and residual mass source with iteration. The results show that: 1) Under the simple boundary conditions, the staggered grid model has better convergence; 2) Under the complex boundary conditions, the convergence of the two sets of grid models is basically the same. It is more effective to determine the stability of the model by adopting the kinetic energy standard than the maximum water level correction and the residual mass standard in the calculation of constant flow.