带自由表面水流与离散颗粒耦合模型研究

发布时间：2018-03-03 09:28

本文选题：离散单元法　切入点：计算流体动力学　出处：《计算力学学报》2016年05期 　论文类型：期刊论文

【摘要】：基于考察泥沙运动的细观行为特征,采用离散单元法(DEM)模拟泥沙颗粒运动,结合带自由表面的水动力学计算模型,建立了CFD-DEM耦合数值模型。计算程序开发基于Fortran语言来实现。耦合模型中实现了硬球模型和软球模型两种颗粒碰撞模型,应用范围较广。作为自由表面水流与泥沙颗粒流数值模型的初步研究,在模型建立的基础上,对模型做了基本的验证。分别通过单颗粒静水沉降和混合颗粒群分选两个计算工况,验证了模型的正确性及模拟精度。该耦合模型可进一步丰富带自由表面水流条件下泥沙运动的研究手段。
[Abstract]:Based on the characteristics of microscopic behavior of sediment movement, the discrete element method (DEM) is used to simulate the sediment particle movement, and the hydrodynamic model with free surface is used to calculate the sediment particle movement. The CFD-DEM coupling numerical model is established, and the calculation program is developed based on Fortran language. In the coupling model, two kinds of particle collision models are realized: the hard sphere model and the soft sphere model. As a preliminary study of the numerical model of free surface flow and sediment particle flow, based on the establishment of the model, The model is verified by two calculation conditions, one is static water settlement of single particle and the other is separation of mixed particles. The coupling model can further enrich the research methods of sediment movement under the condition of free surface flow.
【作者单位】：上海交通大学船舶海洋与建筑工程学院;河口海岸交通行业重点实验室;上海交通大学水动力学教育部重点实验室;
【基金】：国家自然科学基金(11572196;BC0100133) 国家973计划(2014CB046200) 水利部公益性行业科研专项经费(201401027) 河口海岸交通行业重点实验室开放课题(KLECE201303)资助项目
【分类号】：O352

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