| 蒋昌波,白玉川,赵子丹,张红武.波浪作用下涡动沙纹床面的悬沙运动数值研究[J].水利学报,2003,34(3):0093-0097 |
| 波浪作用下涡动沙纹床面的悬沙运动数值研究 |
| Numerical study on suspended sediment movement in wave boundary layers over rippled bed |
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| DOI： |
| 中文关键词: 波浪边界层 涡动沙纹 悬沙 数学模型 |
| 英文关键词: wave boundary layer vortex ripple suspended sediment numerical model |
| 基金项目: |
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| 中文摘要: |
| 作者建立了波浪作用下的立面二维水沙数值模 型，并对涡动沙纹床面的悬沙运动进行研究。结果表明：悬沙颗粒的沉降速度较小时，其运 动受到涡动力特性的影响比较显著。而且在沙纹波峰断面和沙纹波谷断面，半个周期里都可 以观察到两个悬沙分布的峰值，主要是由于流动分离形成分离涡，涡运动携带泥沙颗粒而出 现峰值。计算成果在一定程度反映了涡动结构对悬沙运动的影响。 |
| 英文摘要: |
| The authors established a model of the distribution of suspended sediment by means of a 2 D numerical model.For a large settling velocity,the suspended sediment was confined to the vicinity of the bed and its suspension patterns were dominated by local bottom shear stress.For a small settling velocity,the suspension was controlled mainly by the characteristics of vortex.Two suspended sediment movement peaks were observed in the cross section at the trough and crest during the half period with the second peak being due to the separation bubble taking up the sediment. |
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