| 白玉川,许 栋,王玉琦,张梅亭.二维溃坝波遇障碍物的水流泥沙数值模拟[J].水利学报,2005,36(5):0538-0543 |
| 二维溃坝波遇障碍物的水流泥沙数值模拟 |
| 2-D numerical simulation for water flow and sediment transport of dam-break wave |
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| DOI： |
| 中文关键词: 溃坝 水流 泥沙 Godunov格式 |
| 英文关键词: dam-break wave water flow sediment transport numerical simulation Godunov-type scheme |
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| 摘要点击次数: 1730 |
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| 中文摘要: |
| 本文通过对浅水方程进行Godunov差分离散和对泥沙运动方程进行一阶迎风差分离散，建立了平面二维溃坝水流泥沙数值模型。在算例中计算了溃坝波遇障碍物后的水流反射、绕射及泥沙冲淤，计算结果表明，溃坝波遇障碍物后会产生明显的反射和绕射，并在障碍物前形成壅水、障碍物的侧面会发生剧烈的冲刷，障碍物前后则会发生局部淤积。本模型能够较好地模拟溃坝间断水流的运动，结果符合水流泥沙运动的基本规律。 |
| 英文摘要: |
| Based on the Godunov-type scheme discretization for shallow water equation and first-order upwind scheme discretization for sediment transportation equation, a 2-D plane numerical model for simulating water flow and sediment transport of dam-break wave is established. The numerical model is applied to calculate an example with an obstacle encountered to the wave. The calculation result shows that reflected and diffracted waves occurred when obstacle is encountered and strong erosion happened to the foundation, but silting is found both in front and behind the obstacle. |
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