随机填充球床通道内单相流动数值模拟方法研究

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基金项目:

国家自然科学基金资助项目(11075042)

Numerical Study on Single Phase Flow Resistance Characteristics in Randomly Packed Channel with Spheres

Nuclear Safety and Simulation Technology Key Laboratory of National Defense Disciplines, Harbin Engineering University, Harbin, 150001, China

摘要: 利用离散单元方法(DEM)建立通道内球体随机排列几何模型,对通道内单相流动进行数值模拟并进行验证。网格划分中的曲面接触区采用搭桥法处理不仅可生成高质量网格,而且使整体网格数量也明显减少。验证结果表明:计算得到的通道内径向孔隙率分布、平均孔隙率以及流动阻力与经典关系式吻合较好;计算模型能够很好地体现出边壁效应对流动阻力的影响。
- 随机填充球床通道 /
- 单相流动 /
- 数值模拟
Abstract: The randomly packed bed with spheres was generated by discrete element method（DEM）.Single phase flow through the packed bed was simulated and validated.For contact issue of the particle to particle and particle to wall in the meshing,a bridge method was presented,which is not only used to generate high-quality grid,and the overall number of grid are reduced significantly.Simulations of the radial porosity distribution,average porosity and flow resistance are agreed with the classic correlations,and the validated models can reflect the wall boundary effect on the flow resistance.
- Randomly packed channel /
- Single phase flow /
- Numerical simulation