摘要
利用已有的物理模型试验成果,建立平面二维水动力数值模型,对桩墩的壅水进行计算,探讨几种紊动黏性取值方式对壅水计算的影响。研究结果表明:桩墩壅水的计算值与实测值吻合较好,验证了数学模型的合理性;利用选取常量、控制计算单元Peclet数以及应用Smagorinsky方程等3种紊动黏性取值方式均可以成功地进行壅水计算,其中以Smagorinsky方法最优。
Abstract： In combination with existing model experiments, a 2-D hydrodynamic numerical model was established to calculate backwater effects caused by bridge piers, and the effect of several eddy-viscosity determination approaches on backwater calculation was discussed. The results show that the calculated value is in good accordance with field data, and therefore the numerical model is applicable in practice. It is also concluded that three approaches to determination of eddy-viscosity, i.e. using the eeustant eddy-viscosity coefficient, controlling the element Peclet number, and adopting the Smagorinsky equation, could be used in the numerical model, with the Smagtinsky method being the recommended one.
出处
《水利水电科技进展》
CSCD
北大核心
2008年第5期25-28,70,共5页
Advances in Science and Technology of Water Resources
基金
四川大学水力学与山区河流开发保护国家重点实验室开放基金(0603)
