| 刘诚,沈永明.水生植物对河道形态影响的三维湍流模型[J].水利学报,2010,41(2): |
| 水生植物对河道形态影响的三维湍流模型 |
| Numerical modeling of alluvial landforms with the impacts of aquatic vegetation |
| |
| DOI： |
| 中文关键词: 三维湍流模型 非正交曲线坐标系 水生刚性植物 河道形态 崩岸 床面变形 水流结构 |
| 英文关键词: Three-dimensional turbulence model non-orthogonal curvilinear coordinatesmm adaptive grid aquatic vegetation alluvial landforms bank failure sediment transport flow structure |
| 基金项目: |
|
| 摘要点击次数: 3637 |
| 全文下载次数: 1166 |
| 中文摘要: |
| 植被是河床和河岸稳定性指标中的一个重要参数，它主要通过影响水流结构进而影响河道的形态。本文建立曲线坐标系下的三维湍流模型研究水生植物对河道形态的影响，在水流控制方程中加入植物阻力项和植物密度项来描述水生植物对水动力特性的贡献，通过泥沙质量守恒方程求解河道变形，在适体网格中求解模型的控制方程。应用该三维模型数值模拟了矩形水槽内两侧交替布置的非淹没刚性植物对水流结构的影响以及梯形河道内两侧交替布置的非淹没刚性植物对河道形态的影响，数值计算结果与实测结果吻合良好。 |
| 英文摘要: |
| Aquatic vegetation in channels generally plays an important role in channel stability and influences landforms and channel morphology. A three- dimensional turbulence model in non-orthogonal curvilinear coordinates is proposed to investigate the impacts of vegetation on channel morphology. The model includes vegetation-induced drag force and vegetation density in the control equations to describe the effects of vegetation on flow structure, and solves sediment continuity equation to compute channel geometry. All the control equations are solved in an adaptive grid. The alluvial responses to riparian vegetation in experimental channels are modeled. The calculated results are in good agreement with experimental data. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |