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山区河流二维推移质数学模型及应用研究——以望谟河整治工程为例 被引量:2
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作者 周维 郜会彩 吴腾 《长江科学院院报》 CSCD 北大核心 2016年第8期6-10,共5页
为了充分利用我国西南山区丰富的水能资源,同时减少望谟河因山洪引起的高含沙水流洪涝和泥石流灾害,应用二维水流泥沙数学模型常用的控制方程式,采用有限体积法对方程进行离散,并使用"冻结法"对模型中陆地边界进行处理,建立... 为了充分利用我国西南山区丰富的水能资源,同时减少望谟河因山洪引起的高含沙水流洪涝和泥石流灾害,应用二维水流泥沙数学模型常用的控制方程式,采用有限体积法对方程进行离散,并使用"冻结法"对模型中陆地边界进行处理,建立了具有一定通用性的山区河流的二维推移质数学模型。利用建立的模型对贵州省望谟河新屯段进行了流场和推移质冲淤模拟计算,并进行了望谟河整治工程影响分析。结果表明:对于望谟河水位和河床冲淤变形验算,数值模型计算值与经验公式推算变化趋势一致,数值也较为接近;整治工程实施后望谟河沿程的水位绝大部分发生不同程度的降低,仅局部存在微小的抬高;望谟河整治后,同流量下,水位降低,流速归槽泥沙淤积减小,有利于河道防洪。 展开更多
关键词 山区河流 二维推移质 数学模型 冲淤变化 河道整治工程
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Developing a 2D vertical flow and sediment transport model for open channels using the Youngs-VOF method
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作者 赵东淼 唐军 +3 位作者 吴修广 林昌宁 刘丽君 陈剑 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2017年第2期444-451,共8页
A 2D vertical (2DV) numerical model, without o-coordinate transformation in the vertical direction, is developed for the simulation of flow and sediment transport in open channels. In the model, time-averaged Reynol... A 2D vertical (2DV) numerical model, without o-coordinate transformation in the vertical direction, is developed for the simulation of flow and sediment transport in open channels. In the model, time-averaged Reynolds equations are closed by the k-e nonlinear turbulence model. The modified Youngs- VOF method is introduced to capture free surface dynamics, and the free surface slope is simulated using the ELVIRA method. Based on the power-law scheme, the k-e model and the suspended-load transport model are solved numerically with an implicit scheme applied in the vertical plane and an explicit scheme applied in the horizontal plane. Bedload transport is modeled using the Euler-WENO scheme, and the grid-closing skill is adopted to deal with the moving channel bed boundary. Verification of the model using laboratory data shows that the model is able to adequately simulate flow and sediment transport in open channels, and is a good starting point for the study of sediment transport dynamics in strong nonlinear flow scenarios. 展开更多
关键词 sediment transport 2D vertical model Youngs-VOF Euler-WENO bed evolution
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