A comparison of numerical model experiments of free surface flow over topography with flume and field observations
A comparison of numerical model experiments of free surface flow over topography with flume and field observations
复制标题
地形自由表面流数值模型实验与水槽和现场观测的比较
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
J. Xing
中科院分区：
文献类型：
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作者：
B. Johns;R. Soulsby;J. Xing
利用数值模型模拟了自由浅水在海底地形特征上的流动。该模型在湍流能量方程的水平上实现了湍流闭合，允许包括流体静力和流体动力对压力场的贡献，因此，成功地再现了不对称沙波结构下游的流动分离。实验描述了几何和流动参数的选择，以便与最近报道的水槽和现场观测研究相对应。实验水槽研究代表了在高度控制的实验室条件下对平均和湍流特性的特别详细和良好的确定。在平均流体速度、湍流能、运动剪切应力和流动分离区范围等方面，模型与实验结果基本一致。该模型的第二个应用涉及……
A numerical model is used to simulate free surface shallow water flow over bottom topographical features. The model, in which turbulence closure is achieved at the level of the turbulence energy equation, allows for the inclusion of both the hydrostatic and hydrodynamic contributions to the pressure field and, accordingly, is successful in reproducing flow separation on the downstream side of an asymmetrical sandwave structure. Experiments are described in which the geometrical and flow parameters are chosen so as to correspond to recently reported flume and field observational studies. The experimental flume studies represent a particularly detailed and well-conducted determination of mean and turbulent flow properties in highly controlled laboratory conditions. Good overall agreement is found between the model and experimental evaluations of the mean fluid velocity, the turbulence energy, the kinematical shear stress and the extent of the flow separation zone. The second application of the model involve...